If you have the 1.15 patch installed the game will generate an exception.txt file in your My Documents\My Games\Titan Quest directory if the game crashes. You can submit that crash log as an attachment to:
When you submit error reports, they should attach the TitanQuest.dmp file.
We will not be responding back to any emails sent to this address, this is just a way for people experiencing crashes to get us the information about the crash.