I have a vintage copy of the flowcharting program called OmniGraffle that I decided to test in Mac OS X 10.6. When I tried to run the Export function from the File menu, the program generated a popup error message (unrecognized selector sent to instance 0xf713a60) and got stuck in an endless loop where the only recourse was to force quit the application.
I’m running OmniGraffle 2.2. The current release is version 5. Browsing the message boards, I noticed where users reported that upgrading to the latest release fixed most of their problems with the application. Given the age of the software, it’s not surprising to encounter glitches such as this.