Pretty much everything that isn't listed below.
What does not
Toolbar icons don't fit into the buttons.
There is a delay (about 2 seconds) when going into properties for items. Fields appear blank during this delay.
Default user defined apps (ping, telnet, etc) - Can't find ping or telnet. These are just examples really though, and may not even work 100% in Windows.
What was not tested
Extra symbol packs
|Operating system||Test date||Wine version||Installs?||Runs?||Used|
|Current||Debian GNU/Linux 5.x "Lenny" x86_64||Sep 15 2008||1.0.0||Yes||Yes||Silver||an anonymous user|