Mac OSX 10.9.4
Browser hangs with spinning beach ball for up to 30 seconds. Error message that the flash plugin has crashed. I believe this applies to ads that use audio/video -- which are a pain in the butt anyway because they autoplay after a delay. Does not happen all the time, just sometimes with the audio/video ads.
My hardware acceleration is turned off -- per directions somewhere on the InterWeb. This only happens on PSD. I have no issues with Flash on any other site.