I seem to be experiencing a problem when using Flash content on my Mac (specs
below) upon upgrading to Flash Player 9.0r45. After viewing two or three
pieces, my computer slows to a crawl; for example, windows and menus take an
incredibly long time to draw, and my dock zooming is choppy. When I first
experienced the problem (not knowing what may have been causing it), I went to
my Activity Viewer to see if an app/process was misbehaving, and I found that
WindowServer was taking anywhere from 70 to 90 per cent of my CPU. It wasn't
until yesterday that I discovered this slowdown seemed to occur after viewing
Flash content. Logging out fixes the slowdown issue, until the next time it
happens, of course.

I've since downgraded to 9.0r28, hoping that will solve the problem for now,
but I'm hoping that some tech genius at Adobe is able to figure out what's
going on and is able to fix this problem in the next release. I'm currently
using a Power Mac G4, upgraded to dual 1.2 GHz processors (PowerPC 7447). My
system has 640 megabytes of RAM, and has ample free hard drive space. I'm
currently running Mac OS X 10.4.9 (8P135) and Safari 2.0.4 (419.3).