Well, it looks like you probably won't be able to use this coupon on a trial size (thanks for letting us know, Sherry!). P&G has come up with a reason why on their facebook page, although in my opinion it should be okay. But, we don't make the rules so at this point we have to say that the below post is no longer valid.
Buy Single Load Tide $1.03
Use $2/1 Tide coupon from 10/30/11 P&G
FREE + $1.03 overage
Thanks, I Heart The Mart!!