Hi!
In Google Webmaster tools I see a lot of crawling errors, 404 pages, most of them looks like that:
http://www.mysite.com/?page_id=9236&cid=Mjg%3D
?page_id=9236&cid=NTU%3D
?page_id=9236&cid=MjU%3D
?page_id=9236&cid=MjA%3D
?page_id=9236&cid=Mjc%3D
What the hell are these entries?