1. Use some method of monitoring game FPS (eg FRAPS)
2. In editor, load attached repro mission. Preview mission.
3. Note string length is displayed by systemChat, while string is displayed by hint.
4. Repeatedly activate radio Juliet to double string length. Observe FPS drop as string length increases, and game eventually hangs.
5. Modify mission to display myString using systemChat, or in watch field of Debug Console and observe similar drop in FPS.