For some reason, some (not all) of the frontpage newsposts get listed as null in the Recent Forum Posts-window:
It's not really a big nuisance since clicking the link leads you to the post, just a minor bug I thought I'd report. My apologies if this isn't the correct forum for such things.
Edit: In this case the null lead to "Diablo III Launching May 15 – Digital Pre-Sales NOW OPEN", earlier today another null lead to "MMO-Champion Giveaway - Pandaren Monk - Day 3".
A database error, perhaps? Seems like you've got some empty fields on your hands.
Edit 2: On second thought, it might be all of them. I'll have to wait until more posts show up on the frontpage to tell.