Maybe somebody knows where is the \"Run > Stop on Objective-C exception\" menu in Xcode 4? I\'ve used it sometimes in Xcode 3, but it disappeared in the new IDE.
Someone else told me this, and I'm adding it here so I can favorite this question and have a useful reference to look back on.
Set the objc exception breakpoint action to po $eax and you'll usually get the handy-dandy exception message right there in the debugger window when it breaks.