Quoted from jgreene:You still need to track down what is getting shorted. The ground pin is a safety mechanism in case of a short to the cabinet parts.
Exactly - the power bar not being grounded should NOT be shocking anyone - there's still a problem somewhere. But if everything else is still working OK, it's probably not a problem you HAVE to deal with. But if it were mine, I'd want to figure it out and fix it.