ps2pdf / eqn / square root problem

[Greg Shenaut]

I don't know if this is the right place to direct this problem. I  
have a manuscript that I format with groff -e -ms, that has an inline  
equation using the eqn "sqrt" operator. When I format the manuscript  
to postscript, and look at it (with gv) or print it on a postscript  
printer, the square-root radical comes out perfectly. However, when I  
use ps2pdf to "distill" the postscript to pdf, it is messed up: the  
equation starts OK, the √ seems ok, but the line over the contents of  
the radical begins on top of the radical. (When I use Adobe or  
pstopdf, I get even worse errors with this.) It appears to be an  
interaction between how groff generates the postscript code and how  
the pdf distillers interpret it. Since the groff-generated postscript  
prints correctly, I'm assuming that it's mostly a gs/ps2pdf problem.

I am using OSX 10.4.10 (macports), groff 1.19.2_1, and ghostscript  
8.54_0.

For the moment, I've used a little algebra and rewritten the relevant  
section of my manuscript in such a way as to avoid the square root,  
but it would be really great if someone could take a look at this for  
future purposes. I've attached a short example in postscript along  
with the corresponding output of ps2pdf.

Thanks,
Greg Shenaut