Any node that uses a preview window (viewer, composite, image, etc.) displays very distorted. The original (and correct) image gets scaled improperly in the x-direction. whether it's stretched too far, or squished too narrow depends on the size of the window. It seems that as the window gets larger the x-scale factor increases.

If the correct image doesn't fill the frame some other seemingly random image data fills the rest. Sometimes this is pure static, sometimes it's part of another image involved, sometimes it's a duplication of the original but to a different scale, or sometimes is a combination.

The actual image that is getting passed to these nodes are correct as far as know. When displayed in the image editor, they are displayed correctly. likewise, when the final render is obtained, there aren't any unusual artifacts.

OS: Mac OSX v10.5.4
CPU: 2.4 GHz intel core 2 Duo
RAM: 4 GB 667 MHz DDR2 SDRAM
GFX: GeForce 8600M GT