jit.qt.movie: could not create temporary GWorld for open()

I get the error "jit.qt.movie: could not create temporary GWorld for open()" when looping through loading hi-res still images into jit.qt.movie via asyncimport. I get the error (and no more loads) after about two dozen images load. The load loop interval is long enough that I know the previous image has been completely loaded before loading the next. There is no metro clocking jit.qt.movie, just a bang sending the loaded still on for processing. I've started sending a "dispose" message prior to each asyncimport in hopes of fixing this problem, but no love.

(It is possible that my GPU is full up with textures and slab processing from things happening down the pipline (very complex set of patches), but I'm under the impression that jit.qt.movie uses CPU and system RAM rather than GPU?)

The only other post I've found about this error seemed to solve by compiling the source images in a movie and changing the frame index... not a viable option for my application.

Max 6.1.3, Mac Pro 2.66GHz Quad-Core Intel Xeon, 8GB 1066 DDR3, ATI Radeon HD 5870, Mac OS 10.6.8

Any help appreciated! Thanks!

Jeff