The AutoProtect feature of Norton AntiVirus may prevent iPhoto from exporting a slideshow to QuickTime or iDVD. When this happens, you will see this message:
An error occurred while exporting the slideshow.
To resolve the issue, temporarily turn off AutoProtect in Norton AntiVirus.
Important: Information about products not manufactured by Apple is provided for information purposes only and does not constitute Apple's recommendation or endorsement. Please contact the vendor for additional information.