Cisco UC500 Power Sensitivity

Maybe you all have not seen my posts about replacing a couple of UC500s before.  If not, here are the links to them if you are interested.
http://www.shanekillen.com/2013/03/cisco-uc500-another-one-bites-dust.html
http://www.shanekillen.com/2011/06/replacing-dissimular-cisco-uc500s.html

So here is the thing with this.  This one customer of mine has had their UC500 replaced I think seven times.  Yes, that is right.  SEVEN times.  It would appear that there is some sort of power problem at this customer.  This always happens when a storm comes through.  Every time (except this last time), no other equipment gets ruined except the UC500.  I have had this on a line conditioner.  I have this on a UPS.  No matter what I do, its the same story.
Has anyone else had this sort of experience before with the UC500s?  Id be interested in hearing about it.