RE: 23.0.60; OSX: Case insensitive file name completion

[Drew Adams]

> On OSX 10.4.11, I have ~/Desktop and ~/DES.pdf. Until recently, when I
> did "C-x C-f ~/Des TAB", it would expand to Desktop. Now, both
> "DES.pdf" and "Desktop" are considered possible expansions of "Des".
> 
> I see the point, because the default file system on OSX appears to be
> case insensitive. Still, it is a regression for me: I find the
> previous default behaviour of Emacs (which is also the default in
> 22.2) much better, since it often allows faster expansion if you know
> the stored case of a file. Is there a way to get it back? Thanks!
> 
> 
> In GNU Emacs 23.0.60.2 (i386-apple-darwin8.11.1, GTK+ Version 2.12.9)
>  of 2008-04-29 on mt-computer.local
> Windowing system distributor `The XFree86 Project, Inc', 
> version 11.0.40400000
> configured using `configure  '--disable-font-backend''

I could be wrong, but I suspect the difference is that PDF files (*.pdf) are no
longer ignored files for completion (variable `completion-ignored-extensions'),
by default.