There have also been some issues reported with v.126.96.36.199 changing user configurations such as the preview settings. This may well explain some of the problems.
I have not had any issues with 188.8.131.52 thus far.
Doubt should bkup with Customize or Main Movie without any problems.
Be certain to choose Title 43 as posted in one of the threads on Doubt.
Fengtao is working on this flick and should have it sorted anytime now