I'm testing Jitsi stable. I have called from my computer (windows xp) a friend (ubuntu) with Google Talk authentication.
Audio and video call are fine. Desktop sharing from Windows to Ubuntu work fine, from Ubuntu to Windows does not work and Jitsi stop working correctly: I have killed the process run.exe and restarted Jitsi.
File transfer from Windows to Ubuntu stop every time at 448 Kb (but file is 532 Kb). If I click on retry link, the transfer does not restart. If I click with right mouse button on the account and select "Send file" a new transfer start correctly (but stop at 448 kb).
Logs available at http://monteldvd.sourceforge.net/jitsi.zip