BONEBREAK,
Before you noticed the crack, did water start leakign from that top left corner? Because if I fill up the water to where the plastic starts at the top, the water will leak, I am guessing it is not sealed perfectly around the corner because that is where it is leaking. I dont see any cracks with mine and also according to this guys picture, his crack was also from the left top. I hope mine wont crack, if i lower my water level it doesnt leak, only if i go all the way to the top where the plastic is that is holding the glass. I have the 2005 model with the serial number, what about you?