Yeah it sucks alright. But luckily someone was here that could do something about it so all was not lost.
Here's a couple of pics of the crack. It runs from the bottom corner all the way diagonally to the top. It looks like it originates from a chip in the glass that the tank maker has tried to glue back in with silicon. Obviously, not such a good idea.. :-?
and here's a pic of the siliconed chip..
And finally here's where the 1 senegal, 2 peru angels, 1 parrotfish, 1 leopard ctenopoma, 1 blue dempsey, 1 bristlenose and 1 siamese algae eater got dumped into (both angels are being ninja and hiding behind the big ornament somehow :-? )