Thanks Richard, David and Harry for your help. I have trashed my Quicktime and reinstalled it. Initially it seemed to work without the jerky intermittent playback. Then I realized that my tablet/mouse combo (Wacom Graphire 3-usb version) is probably the cause. If only quicktime is running and I only click the mouse button once to start the video, it plays completely start to finish. If I move the mouse or for some reason click anywhere (even on the quicktime window); the jerky problems start to happen. Ive discovered that theres an updated driver software for this but I need to find a normal usb mouse before I can uninstall the original driver. This is the Wacom info I found: The Graphire3 Driver supports the Graphire3 tablets on Mac OS X v.10.2.6 or later and supports BOTH the native and classic environment of OS X. It includes all supported languages. NOTE: If you have recently completed an operating system upgrade first uninstall your current tablet driver then install version 4.86-6. Complete instructions available in FAQ 335 or Keyword Tiger in the FAQ search field So, with your help, at least I found the likely culprit! Thanks guys, I knew this group could help me yet again! When I get the driver updated, (it may or may not improve the situation) I will let you all know if theres improvement! Sincerely, Tom -------------- next part -------------- An HTML attachment was scrubbed... URL: http://listserver.themacintoshguy.com/pipermail/g4/attachments/20070113/97386cb8/attachment.html