Upon loading from a saved game, selecting units with a left click causes a CTD. The unit is Eldmyre the Trader with 5 peasants. Also happends if selecting NPCs not recruited named Jimmy Hornswaggle. Also going to menu and clicking designing new units will cause CTD.
dxdiag: http://pastebin.com/fEbSCTrH
debug.err: http://pastebin.com/Wb9KNdxs
Dump file: http://dl.dropbox.com/u/6232418/Elemental0_302-2010-04-30T23-50-38-471.zip
If you want the save file let me know.