Hello Fellas, I am new here but have been using Mac machines since 5 years however the problem I am having these days is driving me crazy and I can't seem to find a solution. I have read across the forums and I am sure I am not the only one having this issue so maybe this thread will help more people. Basically every time I try to watch a Flash related streaming website (Ustream.com, YouTube.com, MLB.tv) my computer crashes (I have read of browsers crashing before but not an actual crash by the entire Computer, scary) and I must reboot pressing the Power button. I am almost sure it is a Flash issue because of three things: first, I thought this could have been some sort of Virus and decided to format my Computer (late 2006, iMac Power PC, version OS X 10.4.11, 2.16 GHZ Intel Core Duo) only to later find out that the problem was still there, second because when viewing the actual stream I have opened Activity Monitor and noticed how the % of CPU was absolutely above any acceptable average for the browser I was viewing the live stream with (touched 94% on Ustream.com and MLB.tv) and was still very high but not high enough to cause the crash for YouTube (about 45%) and last but not least when I uninstalled Flash my Computer was going very well and showed no sign of problem. This happens with both Safari and Firefox and I have no idea on how to solve it. I watch Baseball games and live streams very often and this is causing me a serious headache! I have tried to downgrade to Flash Version 9 but MLB.tv requires Version 10 and for other websites the issue was still there. I would really appreciate any help from one or more of the Mac Gurus here! Thanks again for reading and looking forward to hearing from you guys. Cheers!