Common problems and how to solve them
read the fucking manual :) The location of config files has been changed for 1.8x compared to 1.7.
Post to our forum with as much detail as possible about the problem
When exactly does the crash happen (Starting the game, joining a server, what's written on the screen)
Try resetting your config and profile (Make a backup first to not miss them later!)
Append the files of the crash reporter to your forum post (Click on "What does this report contain" once the crash reporting dialog has opened)
Pray to the CoD gods
When the request of a screenshot fails, the affected client is dropped.