oh the loading blues. sometimes it even tells me flash freaking crashed. you know the icon, stop the plugin or whatever pops up. i just wait a minute and then it magically loads all fine.
and my pc ain't the best by any means, i kinda stopped bothering since i got my massive game impotence case years ago.
so my advice, press the push start, don't tab to any other tabs, don't do anything if plugin-crashed popup appears and wait a minute.

firefox here