I have pressed that button 10 times today, I hope Blizzard is getting some use out of those crash reports, the crashes seem to be getting more frequent. I have 0 mods running, even the blizzard ones are disabled.
I have had crashes in BG's, Outland and Old world. I have crashed while mounted, on a flight path or just standing around. Hope this helps :|

Thanks for the reports. We do look at them and they are a very important tool for us to identify and eliminate crashing bugs.

Please do be sure to type in a description of what you were doing before the crash occurred, it helps us narrow down what the issue involves.