I shot it on a 5d MkII with 24-105m lens. Aperture was F4 and shutter set to a 50th. ISO was fairly high, around 2000 I think. There was an LED light source coming from the background, which is what I'm thinking maybe the problem with the differing frame rates.
Just looks like low level lighting, speed at 1/50 sec or lower with high ISO setting may help ?? Had similar lighting at jazz concert ISO was 6400 @ 1/50 sec 25 fps PAL, no issues but, LED lighting may be problem. I do not think so ? Lens used was a f3.5-5.6 28-135mm IS is on EF Lens, the Canon 5D Mark II usually handles this sort of problem with ease ? Set your adjustment at A+, it will automatically take you to ISO 6400 if needed, you could go higher if required by setting it manually.
It may be removed in Adobe's Premiere Pro CS5.5.2 ?