I'm running Jitsi built from git commit f5cb93e794 on Linux Mint 16, 64 bit.
Everything seems ok except there's an extra entry in my taskbar. It says "JavaEmbeddedFrame". It seems not to have any actual window associated. I can't close it, though I can move it to another desktop to get it out of the way.
Not a very high priority bug but I didn't see it in trac.