Flash freezes 64bit 10.04

[Rick Berger]

I just upgraded my Gateway SX2800-01c quad Q8300 with nVidia GeForce GT
220 graphics from 64 bit 9.10 to 10.04. And the proverbial problems of
Flash have popped up as usual. After watching 2 to 5 minutes of video in
either Firefox or Chrome the video freezes, audio continues for about 10
-15 seconds and the whole system locks up. Can't even do a Ctrl-Alt-F1
to get a command login prompt. 

Flash seemed to be stable in 9.10 AMD64, is there a way to roll back to
that in 10.04? Or has someone written up a work around?  

Rick