bug#2940: 23.0.92; C-s in dired fails to find files with umlauts

> It looks to me like the problem is that you're on a mac, and [some?]
> mac filesystems silently convert accented characters in filenames to
> "composed form", which is different than the pre-composed characters
> people tend to use.

Indeed, that looks like the culprit (IIUC it's not done by the
filesystem, but by the OS itself before it passes the file names to the
filesystem, so it applies to all filesystems).

> Perhaps the new "ucs-normalize" code (which should be added soon I
> think) would help:

Rather than "perhaps", it should say "supposedly".   Please try out this
new ucs-normalize package and tell us if it solves your problem and/or
suffers from other problems.  It likely won't make it for Emacs-23.1 but
should be included in Emacs-23.2.


        Stefan