If you're even considering spending money on a movie that you normally might not see (COUGHCATWOMANCOUGH) because of the just released Halo 2 trailer that plays beforehand...don't bother. It's like 30 seconds long and probably a third of it is text screens, and the rest of it is so ADD-edited you can't even tell what's going on.
I know it's showing before Catwoman, I Robot and Spider-Man 2...there are probably a few others as well. A nice side benefit on Spider-Man 2 is the fact they show the Blade III trailer beforehand as well.
There's a 2010 thread that suggests - Go To Network Settings - Change Media Server to Disable Try it again then. It seems to have a decent success rate. If not that, there's a suggestion to check to see if your router firmware can be updated.