Ive had 2 now that have leaked from the bottom slowly when water was sitting in the resevior. Decided to take the thing apart on the second one and found a loose hose clamp on one of the hoses connected to the resevior. I could tell this was where the leak was by the amount of corrosion on the connection to the metal tubing there. I put the clamp back in the proper position, filled up the resevior and no more leak.
Of course this was after buying a new coffee pot from a different manufacturer. &&^& Mr Coffee! They used to make great coffee pots that would last forever but now they just make cheap crap. Not gonna be buying their brand again.