I've also been having some stitching problems also,
every now and again, probably more often than not, when i stitch a pano together the images don't blend properly, it doesn't matter if the images have been processed or not, full size files or small jpegs, sometimes they blend perfectly and sometimes they look like the image below.
It happens on both the laptop and the desktop
I was just doing a speed test between the laptop and the desktop, the laptop stitched the 12 22mb files together in 3.52 sec, the desktop in 13.10 sec, although it took forever, the desktops pano came out as expected.
This problem happens on both machines, and are both running CS4.
Any help would be greatly appreciated.
Both images were stitched, flattened, cropped and resized, no other PP was done prior or after stitching.
From the laptop
Untitled_Panorama1 by dulvariprestige, on
From the desktop
test_Panorama1 by dulvariprestige, on