Crash on large drag selection

[nimdahk]

This has happened to me twice, and I can reproduce the bug:
With a large staircase (51+ blocks), when I right click on the top and drag the selection down to the bottom (intending to raise the whole staircase by one block), the game crashes once I've dragged it into the "red area." The red area being the area past which you cannot drag, and the selection turns red, because you are out of blocks.

Windows Vista x32