after i re-read your message, another thought came to mind (how, i'll never know). i had a customer who had what sounds like the same problem after adding a flash in-skin VM. on the off-chance it was a power issue, we put his STSe on a UPS and the problem went away.

worth a try... we use Minuteman's Entrust series, usually the 700VA.

"There is one thing and only one thing in which it is granted to you to be free in life, all else being beyond your power: that is to recognize and profess the truth." - Leo Tolstoy