smallcompany - 4:26 am on Mar 19, 2008 (gmt 0)

It happens I get 404 emails as agents tried to load a page that carried something like

?variable=

which for some reason got translated into

%3Fvariable%3D

Why this happens at the first place, and what determines if it is supposed to happen or not?

This would refer to my campaigns at Google AdWords where I use such variables so I know where the traffic has originated from.

Besides “WHY”, I am also trying to figure if those agents are live people that really wanted to get to my site through AdWords ad, or if those are something else.

User agent always seems to be the same, IP addresses are different:

User Agent = Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)

I see that SV1 stands for "Internet Explorer 6 with enhanced security features (Windows XP SP2 and Windows Server 2003 only)."

Would that SV1 matter?

Thanks