::bump::

Yes, I had the same MAJOR problem with P7, and wasn't fixed in SR1. 

Edi>General Preferences>Misc Tab

Might be smartest to turn ALL of them off.  But if you are hurting for harddrive space, compress the files.   I find it strange that "external binary morphs" function is ON by default, yet this is the problem. 

All files that had the binary morphs saved to them are Ruined.  You've lost this work, just as I have lost work as well.