Hello, I have the same problem yesterday with a new pc installed all "fresh" versions of Mozilla (Firefox 5.0.1 , TB 5.0) All my other pc's were accessible through vnc on my company, but the new one although I could access it, when trying to open TB, the vnc screen "freezes" until I close TB.

Someone that had the same problem suggest that opening TB with option --sync will resolve the problem ...

Unfortunately I cannot reproduce the problem, since it's on a remote pc in other country, and I'm just finished re-installed the previous versions, in order to work

Any ideas are greatly appreciated ,

Regards

Have the same problem using Firefox 5 and Thunderbird 5. Program windows dont refresh until i move the mouse of the program window, like the taskbar, when i do that it refresh, but only once, the the screen stop refreshing. Very annoying bug.

I've found article that could be helpful http://beerpla.net/2009/05/18/how-to-fix-redrawing-problems-in-your-vnc/

Basically you have to change UpdateMethod parameter to 1 in vnc server options. I know it's only for realvnc, but i hope there is similar parameter in other vnc editions.