@danny96: apart from the problem of u not being able to see comodo's tray icon, the other problem recently stated is that comodo firewall is unable to block browsers/ apps that connect to the internet when avast web shield is active is due to web shield being acting as a proxy.
rather than being avast fault here, it is a design flaw of comodo firewall which cannot block any internet connection directed through a proxy (bypassed the firewall). this is potentially dangerous as it can be exploited by malware.
see explanation here: quote from lukor, "Hi guys,
this is really very interesting. Matousec's leak tests show 100% for COMODO, yet, apparently the firewall is not able to catch a Web proxy which our WebShield is.
I am not saying that Comodo is a bad firewall, on contrary, it is highly regarded, but maybe this might be a contribution to the relevancy of the leak tests -- as I see it from my brief glimpse on this issue, any program acting in the same way as avast does can overcome the firewall rules. Somewhat surprising for a product with such high leak-test "certification".
Concerning the fix from avast! side: I doubt we would fix this, making changes in the code, so that other firewalls block our traffic is exactly the opposite what we try to do.
Nice comment on the Comodo forum from the moderator though:
Quote
Re: Comodo Does not work with Avast 7!
« Reply #3 on: February 24, 2012, 06:27:55 AM »
This seems like an issue with Avast.
They changed the code. They will have to fix it.
I only hope that malware and unwanted programs follow the same guideline.
Lukas."
note: quoted from,
http://forum.avast.com/index.php?topic=93953.45 reply #48