Pretty much everything.
What does not
The default font was just about unreadable under Wine, whereas it's fine under Windows. I went into the options and switched the font setting to "system fixed"; this proved to be readable.
What was not tested
Installation and uninstallation; I ran this straight from the program folder.
A few of the FTP commands and some of the options.
|Operating system||Test date||Wine version||Installs?||Runs?||Used|
|Show||Fedora 14||Dec 04 2010||1.3.8||Yes||Yes||Gold||an anonymous user|
|Show||Ubuntu 9.10 "Karmic" amd64 (+ variants like Kubuntu)||Mar 11 2010||1.1.40||Yes||Yes||Gold||A Wine user|
|Current||Ubuntu 9.10 "Karmic" amd64 (+ variants like Kubuntu)||Nov 19 2009||1.1.33||N/A||Yes||Gold||A Wine user|