I've been getting consistent errors whenever I start Unvanquished on my laptop running Ubuntu Gnome 14.04.
Basically, my environment freezes momentarily and then I get the "Application not responding" message (screenshot included). Once I click "wait", Unvanquished runs normally. Does anyone else have this problem? It's not a terrible glitch or anything just thought it might be worth flagging up as a little bug. I've yet to run via terminal to see if any errors get flagged up...
Another issue is that the game is overly sensitive to any touchpad input whilst in the game menu. Selecting items and options is very difficult as the lowest resolution of the pointer seems to be a few milimetres. You're not meant to play FPS with a touchpad I know don't bite my head off!
Apart from this though the game runs flawlessly, although I wish there were more people on the servers!