Weirdness when attempting to check PMs

For some strange reason I can't check my PMs.
If I try to access my PMs I get the login page (even though I am already logged in). If I log in anyway, this takes me straight back to the log in page.

I can browse the rest of the forums and - as you can see by this message - I am able to make posts.

Note: I've cleared out my proxy and browser caches.

Is anyone else having this issue?
Cheers.

Edit: Looks to be o.k. now. Hmm.. weird...

Weird.
Let me know if this happens again.

I haven't seen it since last time.
But will let you know if I do.

I figured you were probably doing some maint. on the site at the time.

TS.