Placing removed part again after undo in VAB totally crashes game

[herbal space program]

Howdy,

Here's an odd bug I've noticed since 0.90:

If you're in the VAB and you pull a part or subassembly off and set it aside, hitting ctrl-Z will replace the part but will also leave the ghosted copy of the part next to your vessel. In earlier versions, it used to be possible to grab this part and place it back on the vessel as well, as a sort of kludgy way of duplicating subassemblies. Since 0.90 however, if you do this the VAB basically freezes up so that you can't place any more parts, nor can you exit to the space center. The only way I'm able to quit the game in this situation to use Task Manager to kill it. As far as I can tell, this behavior is 100% reproducible. Obviously, I don't expect the devs to actually support such an unnatural act, but I think perhaps crashing the whole game is rather a severe punishment!

[Claw]

Yes. Undo is quite buggy/broken. Be careful with it, as it has a tendency to corrupt ships. Especially if debug clipping is enabled.

Cheers,

-Claw