[Bug-AUCTeX] 11.86; Preview background darker than frame background

[carrion . jose]

My preview images appear darker than they should be.  Example:

--8<---------------cut here---------------start------------->8---
\documentclass{article}
\begin{document}
\begin{displaymath}
  a^2 + b^2 = c^2
\end{displaymath} 
\end{document}
--8<---------------cut here---------------end--------------->8---

C-c C-p C-d gives the result: http://tinypic.com/r/2r5g8rk/7

I am using color-theme.el Version: 6.6.0 and I get similar results with
other themes that have non-white backgrounds.  I don't get this behavior
with a white background.

José


Emacs  : GNU Emacs 23.3.1 (x86_64-apple-darwin, NS apple-appkit-1038.35)
 of 2011-03-09 on black.porkrind.org
Package: 11.86

Run buffer contents:

Running `Preview-LaTeX' on `test' with ``pdflatex -ini -interaction=nonstopmode 
"&pdflatex" prv_test.ini   
"\nonstopmode\nofiles\PassOptionsToPackage{active,tightpage,auctex}{preview}\AtBeginDocument{\ifx\ifPreview\undefined\RequirePackage[displaymath,floats,graphics,textmath,sections,footnotes]{preview}[2004/11/05]\fi}"
 "\input" test.tex''
This is pdfTeX, Version 3.1415926-2.3-1.40.12 (TeX Live 2011) (INITEX)
 restricted \write18 enabled.
entering extended mode
(./prv_test.ini
LaTeX2e <2011/06/27>
Babel <v3.8m> and hyphenation patterns for english, dumylang, nohyphenation, ge
rman-x-2011-07-01, ngerman-x-2011-07-01, afrikaans, ancientgreek, ibycus, arabi
c, armenian, basque, bulgarian, catalan, pinyin, coptic, croatian, czech, danis
h, dutch, ukenglish, usenglishmax, esperanto, estonian, ethiopic, farsi, finnis
h, french, galician, german, ngerman, swissgerman, monogreek, greek, hungarian,
 icelandic, assamese, bengali, gujarati, hindi, kannada, malayalam, marathi, or
iya, panjabi, tamil, telugu, indonesian, interlingua, irish, italian, kurmanji,
 lao, latin, latvian, lithuanian, mongolian, mongolianlmc, bokmal, nynorsk, pol
ish, portuguese, romanian, russian, sanskrit, serbian, serbianc, slovak, sloven
ian, spanish, swedish, turkish, turkmen, ukrainian, uppersorbian, welsh, loaded
.
(/usr/local/texlive/2011/texmf-dist/tex/latex/carlisle/mylatex.ltx)
(/usr/local/texlive/2011/texmf-dist/tex/latex/tools/.tex File ignored))
No auxiliary output files.

(./test.tex (/usr/local/texlive/2011/texmf-dist/tex/latex/base/article.cls
Document Class: article 2007/10/19 v1.4h Standard LaTeX document class
(/usr/local/texlive/2011/texmf-dist/tex/latex/base/size10.clo)) )
Beginning to dump on file prv_test.fmt
 (format=prv_test 2011.10.21)
6605 strings of total length 109497
48490 memory locations dumped; current usage is 219&46653
3612 multiletter control sequences
\font\nullfont=nullfont
\font\OMX/cmex/m/n/5=cmex10
\font\tenln=line10
\font\tenlnw=linew10
\font\tencirc=lcircle10
\font\tencircw=lcirclew10
\font\OT1/cmr/m/n/5=cmr5
\font\OT1/cmr/m/n/7=cmr7
\font\OT1/cmr/m/n/10=cmr10
\font\OML/cmm/m/it/5=cmmi5
\font\OML/cmm/m/it/7=cmmi7
\font\OML/cmm/m/it/10=cmmi10
\font\OMS/cmsy/m/n/5=cmsy5
\font\OMS/cmsy/m/n/7=cmsy7
\font\OMS/cmsy/m/n/10=cmsy10
\font\OT1/cmr/m/n/12=cmr12
\font\OT1/cmr/m/n/8=cmr8
\font\OT1/cmr/bx/n/10=cmbx10
\font\OT1/cmr/bx/it/10=cmbxti10
\font\OT1/cmr/m/it/10=cmti10
\font\OT1/cmtt/m/n/10=cmtt10
\font\OT1/cmss/m/n/10=cmss10
5716 words of font info for 21...

[...]

        ... arabi
c, armenian, basque, bulgarian, catalan, pinyin, coptic, croatian, czech, danis
h, dutch, ukenglish, usenglishmax, esperanto, estonian, ethiopic, farsi, finnis
h, french, galician, german, ngerman, swissgerman, monogreek, greek, hungarian,
 icelandic, assamese, bengali, gujarati, hindi, kannada, malayalam, marathi, or
iya, panjabi, tamil, telugu, indonesian, interlingua, irish, italian, kurmanji,
 lao, latin, latvian, lithuanian, mongolian, mongolianlmc, bokmal, nynorsk, pol
ish, portuguese, romanian, russian, sanskrit, serbian, serbianc, slovak, sloven
ian, spanish, swedish, turkish, turkmen, ukrainian, uppersorbian, welsh, loaded
.
CUSTOMISED FORMAT. Preloaded files:
        .
 article.cls    2007/10/19 v1.4h Standard LaTeX document class
  size10.clo    2007/10/19 v1.4h Standard LaTeX file (size option)
        .
No file test.aux.
(/usr/local/texlive/2011/../texmf-local/tex/latex/preview/preview.sty
(/usr/local/texlive/2011/../texmf-local/tex/latex/preview/prtightpage.def)
(/usr/local/texlive/2011/../texmf-local/tex/latex/preview/prauctex.def
No auxiliary output files.


(/usr/local/texlive/2011/../texmf-local/tex/latex/preview/prauctex.cfg))
(/usr/local/texlive/2011/../texmf-local/tex/latex/preview/prfootnotes.def)
Preview: Fontsize 10pt
Preview: PDFoutput 1
)
./test.tex:5: Preview: Snippet 1 started.
<-><->
      
l.5 \begin{displaymath}
                       
Preview: Tightpage -32891 -32891 32891 32891
./test.tex:7: Preview: Snippet 1 ended.(1496405+0x22609920).
<-><->
      
l.7 \end{displaymath}
                     
[1{/Users/xxxxx/Library/texlive/2011/texmf-var/fonts/map/pdftex/updmap/pdftex.ma
p}] )
(see the transcript file for additional information)</usr/local/texlive/2011/te
xmf-dist/fonts/type1/public/amsfonts/cm/cmmi10.pfb></usr/local/texlive/2011/tex
mf-dist/fonts/type1/public/amsfonts/cm/cmr10.pfb></usr/local/texlive/2011/texmf
-dist/fonts/type1/public/amsfonts/cm/cmr7.pfb>
Output written on test.pdf (1 page, 23063 bytes).
Transcript written on test.log.

Preview-LaTeX exited as expected with code 1 at Fri Oct 21 19:15:29
Running `Preview-PDF2DSC' with ``pdf2dsc test.pdf 
test.prv/tmp44740EYW/preview.dsc''

Preview-PDF2DSC finished at Fri Oct 21 19:15:30
Running `Preview-Ghostscript' with ``/usr/local/bin/gs 
-dOutputFile\=\(test.prv/tmp44740EYW/pr1-\%d.png\) -q -dSAFER -dNOPAUSE 
-DNOPLATFONTS -dPrinted -dTextAlphaBits\=4 -dGraphicsAlphaBits\=4 
-sDEVICE\=png16m -r110.522x110.836''

Preview-Ghostscript finished at Fri Oct 21 19:15:30

current state:
==============
(setq
 AUCTeX-version "11.86"
 LaTeX-command-style '(("" "%(PDF)%(latex) %S%(PDFout)"))
 image-types '(png gif tiff jpeg xpm xbm pbm)
 preview-image-type 'png
 preview-image-creators '((dvipng
                           (open preview-gs-open preview-dvipng-process-setup)
                           (place preview-gs-place)
                           (close preview-dvipng-close))
                          (png (open preview-gs-open) (place preview-gs-place)
                           (close preview-gs-close))
                          (jpeg (open preview-gs-open)
                           (place preview-gs-place) (close preview-gs-close))
                          (pnm (open preview-gs-open) (place preview-gs-place)
                           (close preview-gs-close))
                          (tiff (open preview-gs-open)
                           (place preview-gs-place) (close preview-gs-close))
                          )
 preview-dvipng-image-type 'png
 preview-dvipng-command "dvipng -picky -noghostscript %d -o 
\"%m/prev%%03d.png\""
 preview-pdf2dsc-command "pdf2dsc %s.pdf %m/preview.dsc"
 preview-gs-command "/usr/local/bin/gs"
 preview-gs-options '("-q" "-dSAFER" "-dNOPAUSE" "-DNOPLATFONTS" "-dPrinted"
                      "-dTextAlphaBits=4" "-dGraphicsAlphaBits=4")
 preview-gs-image-type-alist '((png png "-sDEVICE=png16m")
                               (dvipng png "-sDEVICE=png16m")
                               (jpeg jpeg "-sDEVICE=jpeg")
                               (pnm pbm "-sDEVICE=pnmraw")
                               (tiff tiff "-sDEVICE=tiff12nc"))
 preview-fast-conversion t
 preview-prefer-TeX-bb nil
 preview-dvips-command "dvips -Pwww -i -E %d -o %m/preview.000"
 preview-fast-dvips-command "dvips -Pwww %d -o %m/preview.ps"
 preview-scale-function 'preview-scale-from-face
 preview-LaTeX-command '("%`%l \"\\nonstopmode\\nofiles\\PassOptionsToPackage{"
                         ("," . preview-required-option-list)
                         
"}{preview}\\AtBeginDocument{\\ifx\\ifPreview\\undefined" 
preview-default-preamble "\\fi}\"%' %t")
 preview-required-option-list '("active" "tightpage" "auctex"
                                (preview-preserve-counters "counters"))
 preview-preserve-counters nil
 preview-default-option-list '("displaymath" "floats" "graphics" "textmath"
                               "sections" "footnotes")
 preview-default-preamble '("\\RequirePackage["
                            ("," . preview-default-option-list)
                            "]{preview}[2004/11/05]")
 preview-LaTeX-command-replacements nil
 preview-dump-replacements '(preview-LaTeX-command-replacements
                             ("\\`\\([^ ]+\\)\\(\\( +-\\([^ 
\\\\\"]\\|\\\\\\.\\|\"[^\"]*\"\\)*\\)*\\)\\(.*\\)\\'" "\\1 -ini 
-interaction=nonstopmode \"&\\1\" " preview-format-name ".ini \\5")
                             )
 preview-undump-replacements '(("\\`\\([^ ]+\\) .*? \"\\\\input\" \\(.*\\)\\'"
                                "\\1 -interaction=nonstopmode \"&"
                                preview-format-name "\" \\2")
                               )
 preview-auto-cache-preamble t
 preview-TeX-style-dir nil
 )

Output from running `/usr/local/bin/gs -h':
GPL Ghostscript 8.64 (2009-02-03)
Copyright (C) 2009 Artifex Software, Inc.  All rights reserved.
Usage: gs [switches] [file1.ps file2.ps ...]
Most frequently used switches: (you can use # in place of =)
 -dNOPAUSE           no pause after page   | -q       `quiet', fewer messages
 -g<width>x<height>  page size in pixels   | -r<res>  pixels/inch resolution
 -sDEVICE=<devname>  select device         | -dBATCH  exit after last file
 -sOutputFile=<file> select output file: - for stdout, |command for pipe,
                                         embed %d or %ld for page #
Input formats: PostScript PostScriptLevel1 PostScriptLevel2 PostScriptLevel3 PDF
Default output device: bbox
Available devices:
   alc1900 alc2000 alc4000 alc4100 alc8500 alc8600 alc9100 ap3250 appledmp
   atx23 atx24 atx38 bbox bit bitcmyk bitrgb bitrgbtags bj10e bj10v bj10vh
   bj200 bjc600 bjc800 bjc880j bjccmyk bjccolor bjcgray bjcmono bmp16 bmp16m
   bmp256 bmp32b bmpgray bmpmono bmpsep1 bmpsep8 ccr cdeskjet cdj1600 cdj500
   cdj550 cdj670 cdj850 cdj880 cdj890 cdj970 cdjcolor cdjmono cfax cgm24
   cgm8 cgmmono chp2200 cif cljet5 cljet5c cljet5pr coslw2p coslwxl cp50
   cups declj250 deskjet devicen dfaxhigh dfaxlow dj505j djet500 djet500c
   dl2100 dnj650c epl2050 epl2050p epl2120 epl2500 epl2750 epl5800 epl5900
   epl6100 epl6200 eps9high eps9mid epson epsonc epswrite escp escpage faxg3
   faxg32d faxg4 fmlbp fmpr fs600 gdi hl1240 hl1250 hl7x0 hpdj1120c hpdj310
   hpdj320 hpdj340 hpdj400 hpdj500 hpdj500c hpdj510 hpdj520 hpdj540 hpdj550c
   hpdj560c hpdj600 hpdj660c hpdj670c hpdj680c hpdj690c hpdj850c hpdj855c
   hpdj870c hpdj890c hpdjplus hpdjportable ibmpro ijs imagen imdi inferno
   iwhi iwlo iwlq jetp3852 jj100 jpeg jpegcmyk jpeggray la50 la70 la75
   la75plus laserjet lbp310 lbp320 lbp8 lex2050 lex3200 lex5700 lex7000
   lips2p lips3 lips4 lips4v lj250 lj3100sw lj4dith lj4dithp lj5gray lj5mono
   ljet2p ljet3 ljet3d ljet4 ljet4d ljet4pjl ljetplus ln03 lp1800 lp1900
   lp2000 lp2200 lp2400 lp2500 lp2563 lp3000c lp7500 lp7700 lp7900 lp8000
   lp8000c lp8100 lp8200c lp8300c lp8300f lp8400f lp8500c lp8600 lp8600f
   lp8700 lp8800c lp8900 lp9000b lp9000c lp9100 lp9200b lp9200c lp9300
   lp9400 lp9500c lp9600 lp9600s lp9800c lps4500 lps6500 lq850 lx5000
   lxm3200 lxm5700m m8510 mag16 mag256 md1xMono md2k md50Eco md50Mono md5k
   mgr4 mgr8 mgrgray2 mgrgray4 mgrgray8 mgrmono miff24 mj500c mj6000c
   mj700v2c mj8000c ml600 necp6 npdl nullpage oce9050 oki182 oki4w okiibm
   omni oprp opvp paintjet pam pbm pbmraw pcl3 pcx16 pcx24b pcx256 pcx2up
   pcxcmyk pcxgray pcxmono pdfwrite pgm pgmraw pgnm pgnmraw photoex picty180
   pj pjetxl pjxl pjxl300 pkm pkmraw pksm pksmraw plan9bm png16 png16m
   png256 png48 pngalpha pnggray pngmono pnm pnmraw ppm ppmraw pr1000
   pr1000_4 pr150 pr201 ps2write psdcmyk psdrgb psgray psmono psrgb pswrite
   pxlcolor pxlmono r4081 rinkj rpdl samsunggdi sgirgb sj48 spotcmyk st800
   stcolor sunhmono svg t4693d2 t4693d4 t4693d8 tek4696 tiff12nc tiff24nc
   tiff32nc tiffcrle tiffg3 tiffg32d tiffg4 tiffgray tifflzw tiffpack
   tiffsep uniprint wtscmyk wtsimdi xcf xes
Search path:
   . : %rom%Resource/Init/ : %rom%lib/ :
   /usr/local/share/ghostscript/8.64/Resource/Init :
   /usr/local/share/ghostscript/8.64/lib :
   /usr/local/share/ghostscript/8.64/Resource/Font :
   /usr/local/share/ghostscript/fonts :
   /usr/local/share/fonts/default/ghostscript :
   /usr/local/share/fonts/default/Type1 :
   /usr/local/share/fonts/default/TrueType : /usr/lib/DPS/outline/base :
   /usr/openwin/lib/X11/fonts/Type1 : /usr/openwin/lib/X11/fonts/TrueType :
   /usr/share/cups/fonts
Initialization files are compiled into the executable.
For more information, see /usr/local/share/ghostscript/8.64/doc/Use.htm.
Please report bugs to bugs.ghostscript.com.



-- 
José R. Carrión
GPG: 0x4d051321