Lee, I clear my cache frequently, actually every time I log out.

The reply to PM function appears to be working now for me, maybe associatated with popup blocker as I got that message this time, and now allow popups from this site!.
But a new wrinkle was this time was that when the PM reply went through, I was logged out of the site???

So trying to clear everything out of cache, letting things clear and come back in later and see how it goes.

Thanks for the help so far!