No, but it may be an indication of sloppy wiring. Under normal circumstances, there should never be any power or current on the ground lead - it is there for safety. Many places come with a 10-year warranty...I'd consider hitting them up - may not do anything, but something built then should comply with code...the ground should be intact. Think they were just lazy and trying to get it done for the absolute minimum costs, and the GC wasn't doing any quality control (nor was the inspector).
Loose connections, faulty neutrals on shared circuits, back-stabbed cheap switches and recepticles or lots of spikes from poorly designed main when large loads turn on and off could cause it. If there are loose connections anywhere, while the light is on, it's like you sat there and turned the switch on and off (maybe very fast) very frequently. Ever have a bulb die after it had been on? Rarely, almost always when it is first turned on.
One thing that may help is to add a whole-house surge suppressor at your breaker panel. To do this correctly, you normally need two free CB slots (one on each leg of the power). That won't help with loose connections, but may help if you have surges and spikes.
Last thing I'd check is the voltage. It's probably fine. If you don't have a multi-meter, and don't mind spending a little more than the very entry level versions, get one that has a peak hold capability and leave it attached say overnight. Many of those that have that capability also have a secondary bar graph that has a quicker response than the digital readout.