I have not been able to find a solution through searching online, but this appears to be a problem others have reported in Windows, Mac and Linux, mostly via Firefox. I did find there was a flash plugin for Firefox that was not actually Adobe Flash. It was a spoof that caused redirect problems and such. I would suggest uninstalling Firefox and reinstalling it fresh without any addons - and do so via the repository. Perhaps a clean install will help if the problem is within Firefox itself.
If Opera uses Firefox settings that may be why they both act in a similar fashion, but I am uncertain whether it does or not. Sorry I can't help more, but not a lot of information is available regarding the "I am alive" redirect that I could find quickly.
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