F-Secure Internet Security 2012 messes up image display in Opera (11.52 and 12.00 build 1155)

I have used F-Secure Internet Security 2011 for a year without any problem.
I upgraded to the 2012 version, but it causes major trouble with Opera:
- website loading takes ages
- a lot of picture are wrongly displayed: for instance, where there would be a given picture, another picture is displayed instead. You need to right click on the wrong picture, select reload, so that the correct picture is actually displayed. Also a completely random picture gets used in place of the favicon.
The problem affects both the regular 11.52 version, and the 12.00 alpha build 1155.

Funny thing is that I tried deactivating everything in the antivirus, but it does not solve the problem.
I have read that this wrongful display of pictures can be due to a corrupted cache, so I have tried to empty it, without success. I then reinstalled everything including the entire computer (I was thinking of performing a clean install of my laptop so I ceased the occasion to do so), but problem came back after reinstalling everything.

I have removed the 2012 version and re-installed the 2011 version, and everything seems back to normal.

I know this might seem as a problem that should be reported to F-Secure more than Opera, but I wanted to see if other people have experienced this, and also wanted to attract the attention of the Developers as they might be able to directly interact with F-Secure for this kind of matter.

I am running Windows 7 Family premium SP1 64bits.

Originally posted by Pouet69:

I know this might seem as a problem that should be reported to F-Secure more than Opera, but I wanted to see if other people have experienced this,

Seems they have.
http://my.opera.com/community/forums/findpost.pl?id=10720502

Hum, I'm surprised this post did not show up when I looked for a solution. Sorry about that.
Might as well close this topic then.

Just edit your post and prefix it with solved.
Only moderators can delete threads.