Noticed the same thing, but only during the sabotage stage.
I have this issue with all the maps that have one of those new storage rooms. They tend to appear blindingly white too. :/
Turn off Geometry Buffers and see if that helps.
Manga @ Triumph
"Meanwhile In The Halls Of Titan"...Titan Network Working To Save City Of Heroes
Save Paragon City! Efforts Coordination
in BAF trial i have annoying powers lag during 3/4 of the trial
in lambda sector i have little powers lag, but a lot of graphical lag, especially in the munitions depot (the training facility is a little less lag)
I've tried the Lambda Sector Trial twice and encountered the same problem both times. At the point where the team enters the lab and storage sections of the facility, I hit terrible lag. I preemptively set all my graphics to the lowest setting before starting the trial (all sliders down, very low for background and character details, particle effects and geometry buffers turned off), but was still unable to move more than a couple inches at a time in the storage section. The lab was a little better but not by much. The only time I could move is if I positioned the camera to face the wall, but then I couldn't see where I was going.
I'm running a 17" Macbook Pro with 2.5 GHz Intel Core 2 Duo, 2GB RAM, and a GeForce 8600M GT. I seem to only be having trouble with the new content (Praetoria/Incarnate Trials).