Ooohhhh, let's see.
I had the poly-top on my D-Tek spiral crack between the two barbs. After coming back from vacation I peeped in through my window and saw something. Luckily the dripping was so slow it evaporated before it dripped off the block and left a water stain on the lexan. Needless to say, I was very lucky. I put my old maze2 on temporarily while I contacted D-Tek. Their customer service was great and they sent me a free aluminum top once they were finished with manufacturing. Very nice.
Most of my other leaks have been during testing. I was trying a new rubbermaid resivoir that leaked because the goop around the barbs wasn't fully dry (user error
). Another leak was from a 90-degree elbow I ordered from dangerden. The seam down the middle of the fitting caused the tubing to not fit uniformly -> leak. I suppose that was a sign that 90-degree elbows are evil
My best story is when I was fiddling around in the case and forgot to plug all my case/rad fans back in. I started playing some ZSNES for a half hour then checked my temps and they were in the low 50s. So I felt the radiator which was warm, heard no fans, and turned the comp off. Yeah -> user error