Thunar was crashing long before the gtk3 port, hopefully it's much more stable now. The clipboard failing on large chunks of data has been fixed too.
Linux is the only desktop OS I use where application crashes and major glitches (some subsystem of KDE crashing, for example) are still like a once every hour or two occurrence, even when not doing anything especially odd or taxing.
That's awesome, I'll try again with new xubuntu, hopefully there won't be such nasty bug, or do you recommend another distro?