Leveled up a champion after a battle. Pressed end of turn, game crashed. In 0.75 I noticed that most of the end of turn crashes happened directly after leveling up a champion and I'm beginning to suspect there is a connection.
http://dl.dropbox.com/u/58121063/%5BCRASH%5D%5B0.77%5D%20End%20Of%20Turn%20After%20Leveling%20Up/FallenEnchantress0_77-2012-01-28T01-19-05-295.zip