Seems to work fine with 2592x1968 set at .5 second intervals, on my unit. It's strange yours doesn't like anything over 900 lines... I know, that's a little overkill, but wanted to see if it can be done.

Granted, I only had it take 50 images at that resolution and duration. Maybe later, I'll set it up for 1000 pics and just let it go.