Symptom
Keynote stops responding or unexpectedly quits during a slide show presentation.
This issue has been reported most often when using 500 MHz iBook computers with Mac OS X10.2.3, but other models may be affected.
Solution
Update to Mac OS X 10.2.4. Information on how to update to Mac OS X 10.2.4 is available in technical document 107362 "
Mac OS X: About the Mac OS X 10.2.4 Update."