I haven't done anything recently such as stumbling or digging but I seem to be getting about 40 guests coming to my forum for no reason. My traffic stats aren't picking it up either???? What could this be?
Digg and StumbleUpon are good for back links. For traffic you are better off posting in forums and writing articles. Article Marketer will help you a lot.
I don't want to offend you but what you are saying is totally wrong... dig and stu gives no other than bounce.