Strange behaviour of cd and ls command during tab completion

[nikhilmehta_263]

Hi,
I have recently installed octave, and find that if I am using tab completion
for searching a file or directory inside the pwd, it lists files that are
simply not present in pwd. I suspect it lists octave commands or functions
or toolboxes, etc beginning with the (partial) string I have typed.
sample:
octave:1> pwd
ans = /home/nikhil

octave:2> ls -lh ./Dropbox/
total 148K
-rw-r--r-- 1 nikhil nikhil 102K 2009-10-01 14:40 Antenna Paradox.pdf
drwxr-xr-x 9 nikhil nikhil 4.0K 2009-12-03 22:11 emc
drwxr-xr-x 2 nikhil nikhil 4.0K 2009-11-08 21:45 friends
-rw-r--r-- 1 nikhil nikhil 1.3K 2009-09-11 16:16 Getting Started.rtf
drwxr-xr-x 3 nikhil nikhil 4.0K 2009-11-08 01:33 Photos
drwxr-xr-x 6 nikhil nikhil 4.0K 2009-12-03 22:11 ProfAndres
drwxr-xr-x 4 nikhil nikhil 4.0K 2009-11-08 01:31 psu_courses
drwxr-xr-x 2 nikhil nikhil 4.0K 2009-11-08 01:33 Public
-rw-r--r-- 1 nikhil nikhil  749 2009-10-08 21:33 RC_strip_rect_FEKO
drwxr-xr-x 2 nikhil nikhil 4.0K 2009-11-18 12:17 resume
-rw-r--r-- 1 nikhil nikhil  167 2009-11-30 12:37 to_do.txt

octave:3> cd ./Dropbox/empirical_
empirical_cdf  empirical_inv  empirical_pdf  empirical_rnd

[in above command, I am using tab & it defaults to "empirical_", which is
obviously not present in pwd, & note that it lists files none of which are
present in pwd].

Am I missing something lame, what is the problem here? Goes w/o saying that
I am going insanely  frustrated (to put it in a civil way)...

Thanks a ton for any pointers!
~ nikhil
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