I switched back to Miranda today, as a result of some heavy problems with Gaim (No connection to ICQ via a Proxy Server, no feature of unblocking a MSN Buddy).
I often had (and even have) the feeling, that the Windows port of Gaim isn’t maintained very carefully. So I decided to witch back to a native win32 App.
Sadly there is no Multiprotocol-IM on Win32 like my favourite IM on OS X: Adium.