I don’t have that camera, but I have a SonyDSR-450 that allows for 24P. I use Premiere Pro 1.5, and I was told to get a true 24P timeline, I have to capture in the “advanced” 24P mode (I’m not sure what Panasonic calls it, but it’s 2-3-3-2 pulldown instead of 2-3) Try a test where you capture in each of those 2 modes (24P and 24P advanced) and then try importing to a new project.
On a related topic – have you tried to make a genuine 24P DVD with no pulldown? It looks like crap with my camera, and I suspect it will look bad with yours as well. Weird motion issues.