Since 1.2 I coulnd't even stay more than a few seconds. 1.20.3 fixed that
BUT
opening edit appearence instant crashes the viewer, systematically.
I found this at the end of the log :
2008-04-24T13:40:26Z i686-linux-client-releasefordownload/llrender/llvertexbuffer.cpp(95) : error
2008-04-24T13:40:26Z ERROR: setupClientArrays: Cannot use LLGLImmediate and LLVertexBuffer simultaneously!
LogLock::LogLock: failed to get mutex for log
http://jira.secondlife.com/browse/VWR-6829