I bought some loops from footage firm and they came in HD .mov format (30fps@1920x1080). I then had to D/L quicktime for my SVP10c. However, the loop won't butt together to make a larger seamless loop. There's a small gap. I've even taken off the snapping and auto-cross-fades but it then overlaps and screws up the whole loop even more. What gives?

Remove that source from your timeline
Make sure "quantize to frames" is turned on.
Turn snapping back on.
Leave auto-crossfade off.
Drag a couple copies to the timeline.

Works?

Make sure you try a render...

I *think* you can just drag the right edge of a clip to the right to cause looping as well, could be wrong about this.

You might also make sure your project settings perfectly match the clip settings.