My points have only failed to post once, and that was when I used an entertainment card as well. When I called about the points, the iDine person called me on it and said the restaurant had noted that I "used a coupon" and so was ineligible for iDIne miles. About 4 or 5 other times I successfully double dipped on ENT and iDine.

BTW, you couldn't have been too "shocked" at reading this forum after you "happened" to find it as you said pretty much the same thing almost 3 months ago in this post:

http://www.flyertalk.com/forum/showp...84&postcount=2

Or you have a very poor memory like the girl in "50 First Dates".