I've had message pages pop up too ... not able to access etc. Most recent was a couple of hours ago but I refreshed the screen and MLU came back but I did completely losethe PM I had just hit send on and a can't access page popped up. That PM did not go through.

I've noticed that perhaps the last couple of days or so that sometimes the pages are extremely slow to load again (both main page forum as well as page to page linking)

Hopefully bugs will get figured out and fixed soon.