I think I finally narrowed down some wicked full system freezes I was having.
Using the 57A1A35 beta I can drag in a HAP file that plays back no problems at all.
If I try to drag in the same clip encoded in PhotoJPEG into Modul8 everything is fine until I attempt to play this clip. Once I select the PhotoJPEG clip Modul8 freezes my entire system needing a hard power off. (may be when the clip loops back around?)
It seems like it may be related to the preview window, as if I have GRID selected without displaying any of my output, Modul8 will continue to run and allow me to select the PhotoJPEG clip, move sliders, etc. (ie: interface is not frozen)
The MOMENT I try to preview the layer or full output containing a PhotoJPEG clip, Modul8 and my entire system freezes.
This is 100% reproducible on my system, and I can provide a video showing it happen in realtime if necessary to illustrate my findings.