So I noticed a similar thread in the Premiere forum, but I can't find any mention yet of this problem in the AE forum.
The problem is this: when I use "warp stabilize" in CS6 on my Mac Pro 12 core, the "background" process only uses one of my cores.
I have my preferences set to use 26Gb of my 32Gb of RAM, though I have multiprocessing off, since I hate the lag that happens when I turn it on.
Any idea how to get Warp Stabilizer to use more of the CPUs? Is there a way to make that first step a "foreground" process? I just have the default video card that came with my Mac (ATI Radeon 5770) so I don't think I get Mercury Engine acceleration.
Warp Stabilize is pretty much the main reason I upgraded to CS6 and I use it a lot. So having it use such a small fraction of the available power is frustrating.