Tonight while we were at Zurvan Amp on Indar on Briggs several members of my outfit experienced a series of serious frame rate drops. This occurred several time throughout our play session. Each time we went to Zurrvan we experienced the frame rate drop. This drop then went on to be the "I can't see the world/seizure inducing" bug. This occasionally progressed to a complete lock up requiring a restart of Planetside. This was likely unrelated to the number of people/tanks/aircraft/explosions in the area since it didn't happen in the more intense fighting we saw in other places.