I use iDVD to make family home movies. Pretty basic stuff; Every 2-3 months download the MiniDV tape into iMovie and add chapter markers in iMovie, transfer to iDVD. In iDVD I usually add 5-6 slide shows on their own separate page, about 30-40 slides per slide show. No avi movies in the slide shows, just slide shows. I do add the avi clips I took with the digital camera into iMovie. Never had problem before, now I'm getting this iDVD "Multiplexer error during muxing prep" and can't finish/burn to DVD. Same blank DVD's used (DVD-R single sided). What should I do? Latest OSX 10.5.7 and latest iDVD 7.0.4 Plenty of free Hard drive space, no apps running besides iDVD, 4GB RAM. I tried deleting the encoded assets and re-doing, same error pops up. This is my project info settings.