I have been having issues playing Flash videos in the current version of Firefox (10.0) as well as the previous version (unknown) over the past few months. When I open a page with a video it will begin playing with an echo as if two videos are playing at the same time with a slight delay on the second video causing an audio echo effect. So basically one video with echoing audio. The websites that I experience this the most are yahoo sports (happens practically every time) and gamespot (happens occasionally). If I refresh the page the echoing effect goes away. I am running Windows 7 64-bit. I have updated video drivers on my ATI Radeon HD 5800 series. My flash player / shockwave is 11,1,102,55 (updated) but I know I have experienced the same problem with previous versions. I have the following plug-ins enabled: 1. Adobe Acrobat 10.1.2.45 2. Current version of Ad-Block 3. Divx Plus Web Player 2.2.0.52 4. Divx VOD Helper Plug-In 1.1.0.6 5. Microsoft Windows Media Player Firefox Plug-In 1.0.0.8 6. Quicktime Plug-In 7.7.1 / 7.7.1.0 7. Real Player 32 Bit Plug-Ins (4 total plug ins) 15.0.0.198 8. Veetle Plug-Ins (3 total plug ins) 0.9.17.0 I have some others as well but I thought these were the only relevant ones. Can anyone help me with my problem?