All double, no trouble promotion details - United
T&C's: ". . . This special promotion is combinable with all other Mileage Plus Dining bonuses. The double miles only count towards the miles you can earn on your spend amount, not on additional bonus miles you can earn through any other Mileage Plus Dining bonuses. . ."
Not bad, so I read this that if you've registered for the United Double Miles Everyday Bonus (good through 3/31/10), you can effectively get triple miles if you dine M, T or W.
1. Miles for the dine
2. Miles for United Double Miles Everyday Bonus
3. Miles for All Double, No Trouble