Yes (using Handbrake), the hiccup occurred at the default frame rate as well (I don't know what that is offhand). 24fps fixed the import problem as stated above, but the hiccup was always present after I changed several of the variables after initially using the default: H.264 vs. MPEG-4, frame rates, even played with the audio. Other interesting things happened, but never could fix the hiccup.
Would hardware be an issue? Mac Mini 512MB RAM, superdrive.
-JflipB