There are 2 problems in this area, the most common is over-filling, as there is no indicator as to when to stop adding fluid.
Most people do nothing until the low level light comes on, then add 3 qt.

The second issue is with the tank itself. They tend to develop cracks around where the little nubbin fits into the socket. Many have added additional stress relief washers at this point when they apply the sealant.
There is a thread on this here somewhere.