Tom, can I ask, what did you actually provide your guys to solve this error?
I'm at a loss of what to tell the vps support guys other than "it's a network problem, it may be a dynamic change of IP (which shouldn't be occurring given its static), and I can still ping my site when it happens"
How did your guys solve the DNS issue? I would guess there some logging software I could install, but I don't know what I'm logging for.
Tks.