Clarification on the flash issue.

It's specific to Google Chrome only. IE does not cause a problem. Google support site already has references to it and from customer comments it appears applicable to both Poser 8 and 2010. I wouldn't be surprised if this already appears in a poser forum somewhere in RR. 

Hang appears to be related to using video and audio files, unfortunately didn't find a fix.

Sorry for the misinformation, I must have forgotten to close down chrome during the testing. If this doesn't help good luck with resolving your issue.