Mac OS X Hints user "troylanes" suggests opening Terminal and typing the following code to disable Problem Reporter:
sudo chmod 000 /System/Library/CoreServices/Problem\ Reporter.appTo then re-enable Problem Reporter, type:
sudo chmod 755 /System/Library/CoreServices/Problem\ Reporter.appAs some of the comments note on this hint, there are other ways to disable Problem Reporter in Snow Leopard. User "ehunt123" responds:
I can't imagine OSX liking/working best if you disable the executable bit on the app itself to be a good idea. I didn't try this nor feel inclined to really test the overall effect because if your desire is to get no report at all, Apple has an option for the "server" mode, where you only get a log of the crash itself (rather handy) but no dialog:defaults write com.apple.CrashReporter DialogType serverApple has a specific app in the Developer Tools for this at CrashReporterPrefs. As mentioned right above and known for quite some time, this does nothing more than modify the global value for com.apple.CrashReporter's dialogtype. This can be modified through the obvious GUI tools or via the terminal.