I have the same issue with .avi files imported from two different sources:
1) Sony DCR-TRV320 (video shot in digital mode and imported using Studio)(720x480, DV, 29.97fps)
2) V.I.O. POV100 (imported via SD card inserted directly into computer)(640x480, DivX, 30 fps) & (720x480, DivX, 30fps)
On one 3 plus hour video from the POV100 the sound is OK at first but at 3 hours the sound is off by 12 seconds.
Both of these files are in sync in Classic Media Player, VLC Media Player, Windows Media Player and Windows Movie Maker and on my laptop using some freebie Ulead (VideoStudio9 SE DVD) software. I’ve gone back and viewed files I used clear back with my Studio v8 and they are also off with current Studio v11.1.2.5231.
I don’t know how these files can be in sync with all of these other programs but not in my current Studio version, without it being the Studio software that is at fault.
I attempted tlwarnkes fix but that was of no help for my issue/s. I guess the next step is un-install/re-install?
Any OTHER suggestions?
HP computer
Windows Vista Home Premium / SP2
Intel Pentium Dual CPU E2180@2.00GHz
6.00 GB RAM
32bit OS (hey, it works for me)