That is indeed strange.
Have you closed down GameGuru and steam and then reopened them to see if you get the same thing?
Reason I ask is the two interfaces (Steam and GG) are closely link with handshaking now, and we would want to spot any trouble like that fast and stop it ASAP.
If this is reproducible on your machine, can you log the steps. ( I know redundant) maybe a screen shot also, and post it in the bug report thread on the main site.
Good spot if this is an issue.
Thanks
Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz, 2400 Mhz, 4 Core(s), 4 Logical Processor(s), 8gb RAM, Nvidia gtx660, Windows 7 Pro 64bit