I'm still trying to figure this one out, but it looks like that CyberSecurity for Mac RC has some issues when it comes to flash content and streaming content. System: Mid 2010 15" MacBook Pro 2.4 GHz Intel Core i5 8GB RAM Mac OS X 10.8.1 ESET CyberSecurity RC (not pro) 188.8.131.52 Frequency: Often Steps to reproduce: This is a tricky one since it's doesn't always occur, but it seems if you have the following conditions, it'll always happen. - Go To YouTube and load up a video with an advertising preroll. Ad will not play and the video will not continue. If you go into the Web Prefernces and remove port 80 as the ports used by protocol scanning, it'll skip the ad and start playing the video right away. - Go To YouTube and play a video. Then, move the time scrubber to a section that is not buffered yet. Video will play for about 15-20 seconds before it does something funny and goes back to the time where you scrubbed and will no longer play the video. - Speedtest.net Flash content does not show. Streaming content from websites such as Twitch.TV and Own3d.tv does not appear to be affected. Ads also plays back without issues. Work Around: - Remove port 80 from the list of ports being scanned by the protocol scanner in Web Protection - Disable Web Protection. About screen: Code: Update module 1040 (20120313) Antivirus and antispyware scanner module 1365 (20120724) Virus signature database 7457 (20120907) Archive support module 1150 (20120828) Advanced heuristics module 1134 (20120903) Cleaner module 1057 (20120626) Translator module 1074 (20120601) Protocol scanner module 1042 (20120709) Database module 1022 (20120709) Mac OS X 10.8.1 (12B19) (64-bit) Darwin (12.1.0) Intel(R) Core(TM) i5 CPU M 520 @ 2.40GHz (2400 MHz), 8192 MB RAM I'll report more issues as I find them.