I know that not many would consider doing the same I did right here, but anyway; I think I've found a bug which crashes the game when being done.
While building a support pillar for the tower's bridge at aloha's Babel server, I wanted to try to build it with the drag n' drop style I liked to use.
I placed the first anchor to the higher point into the bridge first, then come down and place it down to the ground to create a new pillar. Unfortunately I hadn't enough blocks so I went for the tent to get some more.
Note: I was still holding the right mouse button, since I didn't want to climb that dangerous thing all over again.
When I hit the tent the whole game client suddenly crashed.
I tried this same method a couple times while I was on it, and it crashed every time I tried to do that.
Not a very serious bug, really, but I just thought this would be worthy enough to make a notice about.