When i try to watch videos on You Tube, or other flash videos it quits workin or sometimes wont even start up. But here's the catch, flash works fine in Internet Explorer but not in Mozilla. I have tried to unistall and reinstall, but no progress. OS is Windows XP Media Center.

should also add that when it stops working, a box pops up on the screen and says, Illegal Operation in Plug In, The plug in has performed an illegal operation, You are strongly avised to restart firefox. So i press OK and then another window comes up and says Firefox.EXE has encountered a problem and needs to close,:blah: :blah: :blah: Do you wish to send an error report or close? You probably know the one i mean.

Here is a tip from someone at the Adobe forums - this is a known problem, but nobody will fess up to whose problem it is (typical):

I downloaded/ran the Flash uninstall program to uninstall v9,0.28,0. I then downloaded the Flash 9 archive from:

http://www.adobe.com/cfusion/knowledgebase/index.cfm?id=tn_14266

I extracted/ran the non-IE version: flashplayer9r16_win.exe.

Ever since I did this, Netscape 7.2 w/Flash content has been completely stable without a single crash or Flash error message; and sites that require Flash v9 are still happy.

My experience is that Flash 9,0,28,0 has a fatal bug with Netscape 7.2 and the only workaround I have found is to install the previous version (v9,0,16,0) which completely resolves the Flash/Netscape instability. I still surprised I havn't seen any mention of this serious flaw in the Flash support topic: "4a8d52ae—Flash Player 9 Emerging Issues".
Hopefully Adobe will release an update before too long that fixes this problem since I would prefer to use the current version.