ToME: the Tales of Maj'Eyal

I have played couple of reavers & an archmage and I've faced the same issue: game hangs up and do not respond. It happens when I hit the gladiaror with soul rot/flame right after his respawn. I should aslo note that if I hit gladiator with some other spell (like glacial vapour) and then 'flame' him, the game will not crash.
UPD: the same thing has just happend. I cast 'freeze' on the gladiator and waited till he is freed from the ice. Then ToME hanged up. (I'm playing Linux-32 version)
UPD2: the game continues after 5-10 minutes, no hanging at all.

Which arena ? the derth one or the campaign ?

erm, totally forgot about that, sorry
The Derth one. I'm facing the same issues when fighting elven cultists whith one of their sustains on (can't remember which one), so I think the problem is in my videocard.