I was wondering where about 1GiB of system RAM went earlier in addition to why my system seemed so sluggish. Then it dawned on me...
Pity the screenshot captured it at about 50%. Flash was pegging at least one CPU entirely. Adobe products--gotta love 'em.
Fortunately, I don't think this typically affects Windows users. That said, I know a few of you were having issues with Flash crashing periodically while browsing Youtube. Sadly, the Linux version has been all but abandoned...