Quote - I've had that problem with dynamic clothing only, so far. Sometimes I have to delete the offending cloth, reload it and run the sim again, and then re-save the file and then it opens fine. Some glitch I presume. I don't use the save PMD, so... ??

If this happens with dynamic cloth - just reset the simulation and re-run it.

If you have a clue what triggers this - please let me know. For me it always happens when I load another scene - but only occasionally

Regarding PMD's. There were a number of issues solved with SR1 with PMDs. If there are still some left SM likes to know how and when so they can solve it. I am using the PMDs all the time without problem and I have had many issues with it in PP2012 and previous versions - they all seem to be gone now

But that may not explain the issue from the OP