In the last 6 months I have had three side windows "blow" and by blow I mean the exterior glass shatters and sounds like you have been hit by a shotgun.

Have any of you been bothered by this problem?

Prevost service tells me it is not that uncommon. They have had them blow in the box, while a coach is just sitting in the shop and related a story where two coaches traveling together each had a window go on the same highway. They don't know if the vendor had/has a construction problem or if something else is the cause.
One of mine went while on the interstate, one while they were working on it in the shop and the last one at 5 a.m. while sleeping on a very level site. All are on the passenger side.