It doesn't always happen, but sometimes, when I do a search with firefox 21, knoppix 7.0.5, from the google.com site for knoppix forum and then I click on the first result, instead of going to this forum, I end up on:

http://filestore72.info/download.php?id=a0cd929c

very strange, does not happen each time, but happened several times and I watch carefully what I click on.

If I click the back button and click again, I end up properly on this forum. Wonder if the form or my software may have been hacked. No real harm, just click the back arrow and select again, but weird.

Wonder if anyone else has observed this?