This is second hand information so please bear with me!
Both issues happen (seemingly) randomly on sixty identical XP machines, with identical images, running v6.21.1921.1.Lipsync stopping after 30 seconds of script
When playing voice recordings the lip sync stops after 30 seconds, but eyes etc continue to move.
Saving, re-opening sorts this problem and also recording your script in chunks. So six sets of 10 seconds will show the whole script synced.
However this isn't straight forward for up to sixty 7yr olds!Exported model is distorted
Again, randomly... Some students models ended up like the attached picture after being exported...(Providing i've uploaded correctly!)
Bizarre really as someone could have done exactly the same on the machine next to someone with problems and theirs is fine!
Any help appreciated.