I keep a pretty close monitor on Google Webmasters for errors and such in my blog. However, about 10 days ago they started reporting 404 (not found) errors on the blog. The count increases every day and is now up to 601 404's. The URLs all have "undefined" as the last piece of the it:
I've been searching for the source of the problem for days and can't find it. When I go to the referring page, view source, then search for "undefined" there's nothing there. It is likely being generated upon pageload and appears to only happen with Google (since I can't find it using FF, IE, Safari).
If anyone has ANY clues on what plugin or function it may be I would greatly appreciate it.