[h-e-w] Why special treatment of .obj files?

[Bill Baxter]

I'm using EmacsW32 from here: http://www.ourcomments.org/Emacs/EmacsW32.html

It has this annoying 'feature' of treating .obj files differently from
other files.
Tab completion doesn't find .obj file when using C-x C-f.
When I open a .obj it seems to be assuming it's a binary file, even
though the mode-line says it's opened as "Text Fill".

I suppose it's trying to be helpful, since most .obj files proabably
are binaries that the user probably doesn't want to open up.
Unfortunately it's also the suffix for the Wavefront OBJ 3D model
format.

My old version of FSF Gnu Emacs didn't have this problem, so I'm not
sure if it's a problem introduced by emacs 22, or specifically
EmacsW32.

Any info would be appreciated, especially about how to turn the
annoying behavior off.

Thanks!

--Bill