Thursday, September 8th a member named "Villain" posted advertising an autominer. He/She posted a link to a file that you could download (Runescape Auto Miner.Exe I believe) that contained a virus/trojan. The post was DLed in about 9-10 hours after it was posted. If you think at all that you could have been infected, run a scan with your local Anti-Virus tool.
AVG does detect it, but I am not entirely sure if it removed it yet. (Yes, I DLed it knowing there was a virus in it so I could check it out for everyone.)
Don't know if it's related or not, but earlier "runescaperule" was advertising a stat changer and item duper... to get the program, you had to email him your RS username and password. Hopefully nobody did this; if you did, CHANGE YOUR PASSWORD NOW.
Those who will remember, will speak fondly of the warm morning breeze.