Test it on:Video Rai.TV - TG2 - TG2 ore 20:30 del 20/04/2013
it sometimes can be seen working properly in full screen sometimes it doesn’t, even in the same sandbox session (without closing the browser!). >:-D
Changed all caps title to normal case. Eric
In what browser are you testing this and on what OS?
This was tested on chromium browsers, Google chrome and Comodo Dragon in Comodo sandbox. I’m testing it on IE 10 32 bits. I’m on Win7 sp1 64 bits. I installed v. 2801 via internal updater updates not scratch! 
IE 10 32 bits gave same problem, it is browser independent
I managed to reinstall cleanly CIS 2801 with no success. It’s the only thing, everything else is fine. For silverlight, it appears to be linked between the Comodo Sandbox and Microsoft Silverligth 5.1.
NB: I also tested in latest naked Dragon (with no extensions on) and same problem on…!
That sounds like a bug to me. If you have the time and energy please consider filing a bug report in the Bug Reports - CIS board following the format as described in FORMAT & GUIDE - just COPY/PASTE it!.
Reporting of bugs is strictly moderated to make sure Comodo gets clear bug reports. So, please make sure you closely follow protocol. That way your report will certainly be seen by Comodo staff.
