asp.net + Weird looking string appended to URL

[pctool]

I am having weird looking strings like this: \[code\]http://localhost:10012/user.aspx#.UPpCfl54stU \[/code\]appended to the back of my URL and it only happens when I click on Link A when I am in any other pages other then the page of Link A, if I am on the Link A page and click on Link A(Reload) it doesn't happen. Anyone knows what is this and how to get rid of it? Thanks.