Just a note for other snom users, expiriencing the same problem:
With firmware 7.3.10a, we've serious trouble with LDAP directory search (here in Germany) and UTF-8:
no one of our tested models is capable of displaying german umlaute in the search dialog :-(
The 320 is the most usable: it just inverts the background color:
bug report already filed, hopefully it'll be fixed in the near future.
If we find a workaround, we'll post it here. If YOU find a solution, just drop a line to us ;)
Edit 2009-05-16: funny typo fixed ^ ^