At certain coordinates I noticed an issue where clicking and dragging models beyond a point would teleport the bricks to a specific coordinate, or stop them from being dragged. Here’s a video with a demonstration.
Perhaps this has to do with the translate bugs?
Here’s the reproduction place:
I’ve been noticing this too, not happening very often for me though. Does it happen a lot for you?
I believe this is a side effect of this issue:
http://developer.roblox.com/forum/client-bug-reports/12975-moveto-not-working-from-localscripts
Since it started around the same time, and I think the studio uses a similar code to the MoveTo function for dragging models around in studio.
Hopefully when the MoveTo thing is fixed this will be to.