Ideas?

I built some crap, duplicated a brick, cleared all bricks, canceled brick and boom. Crashed.
I also got this. Although it wont be logged, but it was displayed where the error was caused, still I was so stupid to not write it down, but I think that the error was in the file:
fxDTSBrick.cc - Line: 2015
I got it when I removed the ghost brick after it suddenly became "invisible".
Noedit: If nobody noticed, it says in the small alertbox Demian posted:
Fatal-ISV: (\dev\Blockland\trunk\engine\game\fx\fxDTSBrick.cc @ 2015
Check that line! :D
Also, I found a "dead angle" where the temporary brick temporary suddenly disappears.



Do notice that I only jump to get this angle(Took some time to redo it.).
Noedit: After some more tests, it seems that I only have to look at it in the angle of:
45 degrees down.
It doesn't matter where the brick is or where you is. It will always disappear. Also, the position is a major role in it too. Placing it "closer to window in Bedroom" will make it easier to make it "disappear".