*ADMIN DO NOT MOVE THIS TOPIC FROM THIS FORUM PLEASE*
I am using LinuxMint 13 (maya) and I was fully updated yesterday. Yesterday is when these issues started, right after I updated to MintUpdate 4.4.7. At first I got an error message regarding the authentication, there was no option other than to select "ok". After that I was unable all day into the night yesterday to Update without getting errors saying that there was a problem with the repositories. The admins deleted all of my thread save one message and put that in another thread and now that thread is deleted as well. I took it on upon myself to invest most of my day inspecting files (such as the source list and pinging each of the servers and they all replied in a timely manner.
So after doing all of that I then went to lauchpad (https://launchpad.net/linuxmint) and posted an error report (#1091895) so far 5 people verified this error there, if you have the same issues, go to that website and search for the error and post a comment about how it is effecting you (you may have to register).