Having problems with FP 10? Try...
Through out all of the discussions I have read, and failed fixes I have tried the only fix I know for SURE works (at least for me) is installing Adobe Flash Player 9.
Just uninstall Adobe 10, then go here to Adobe's Archives
http://kb2.adobe.com/cps/142/tn_14266.html#main_Archived_versions
Download the last version of Adobe Flash Player 9.
Not sure that it will work 100%, but its the fix that has actually worked for me.
Hope it helps, since Adobe is so unwilling to help us.