Google indexed link hijacked

[smartcanuck]

When one of my stories made the Google top ten (second link) for the keyword "shake this fat," I started watching the link. I noticed that it began tanking in the ranking. It now sits at the bottom of page two on Google.

When I clicked on it I was shocked to find that the link redirected me to a clickbank product. I have taken note of the affiliate id and reported it to clickbank. What I don't understand is sometimes when I click this link I am taken to my website, and other times I am taken to a different link (e.g. clickbank site)

Does anyone know how I can prevent this in the future? I suspect this is the work of a new member that signed up today.

[chuckroast]

Your host was most likely compromised. Is your host Godaddy by chance? Godaddy has had a known issue for a few months where all their linux servers are vulnerable to exploits. Either way, you will want to re-upload all your pligg files from your backup just in case someone has modified any of your files. Change all your passwords as soon as possible.

[envirafriendly]

Are you sure that this happens to just your link? Make sure it doesn't happen to the other Google links because if it does, you might have some sort of virus, malware, rogue, etc...