We used to only have this happen in Mozilla (firefox) but now it happens in IE as well. We back out of everything and delete cache and history and then log back in again. That usually fixes the problem.
Returning me to the login page every few clicks, whatever I try to do...
I have not heard of any issues this morning, La_Valette - and have just had this confirmed by the tech folks. Their comment was that it was most likely an issue related to cookies, so justshelley's advice sounds right on target.
I've also found dukuma's trick of re-starting to be one of the most effective fix-alls ever. Once I even managed to fix a problem with my car by simply re-starting my computer.
OK, that last part isn't really true, but a re-start does seem to solve an amazing number of computer glitches. And, in all seriousness, I hope things are working for you by now.