-Previewing the game
-Opening the image editor
-Editing an object's properties
-Adding an event
-Sometimes even clicking an event or anywhere on-screen
-Waking up my PC with C2 running in the background for a while
doesn't matter how long C2 has been open either - it can happen 2 minutes in or 5+ hours in (although I rarely can keep C2 open that long w/o a crash!)
Specs: Win 8, intel core i5 2500k, GTX660 w/ latest drivers, 8gb ram.
And of course C2 still crashes upon closing. That one happened as soon as the image editor was added and has been around since.
That's about all I can think of...Thought it might've been a RAM thing at first because I usually have lots of other programs open with C2 (skype, dropbox, tiled, graphics gale, FL studio, excel, etc.) but I don't think I've ever gone past ~50% so eh..