I'm experiencing a strange problem. The system sounds play correctly, but when I'm trying to play a .rmvb, a bit of the sound plays, but then it stops and there is only silence. The system doesn't seem strained as there is no lag in the background applications. OpenSUSE 10.3 did not have this problem, but it didn't play the file smoothly.
I think I should mention that I installed Mint after booting the livecd using the "Safe Mode graphics" option. Was that a mistake?
PS. Could playing with OSs like this seriously damage my system in any way? I have backed up all my data.