(I don't know if this is the right place to put this..)
Sometimes when i open a new GW Guru tab or sometimes when i just have a page open for a bit my firewall says that an ip (which is GW Guru's) is port scanning my pc.
That shouldn't be happening. We haven't received any other reports of this so I think it would be safe to say that you need to run a thorough virus/spyware scan of your computer.
Ive had this happen with my Old computer, but once i got my new computer this stopped happening. so youre not the only one. But my old ocmputer had a lot of spys on it. id suggest you to download a spyware program/antivirus.