I had a popup ad after installing a gadget
I have always believed my imac impervious to ugly ads jumping up and down, but I got one this morning after installing a google gadget. I finally called mac support and was advised to purchase a Norton spyware removal tool, unless I could find a free downloadable one.
I had used Disk Utility to run a Disk Permission Verify, and saw that "Owner" had been on "0, should be [my ownerid number]. Also, when I looked in web history and through my logs, the information for that exact time period was missing - as if I had never downloaded the gadget, or even been online at that time. It gave me the creeps and now I feel vulnerable. Perhaps I have been a little too comfortable?
When looking around for info regarding the Owner Permission Repair, I found that it is quite a hot topic. I don't know whether the Repair changing incorrect owner back to me meant that the incorrect owner was an attacker, but it seemed odd; in another log somewhere (processes, I think), I saw my username on all processes except one - that one had a username of "nobody."
Incidentally, the Google Gadget was a hotkey to do multiple searches on a phrase; I can't find it listed on Google now, I don't know how I came upon it before...according to my history and finder, it never existed!
I would love to hear if anyone else has had this experience...I sure will feel dumb if I'm the only one!