Have you changed Column.Sparse?

>I have a picklist class which is basically a textbox and command button put together. I'd like to put this into a grid. (Yeah, I know, it's not the best UI idea, but it works for this purpose). The problem is that when I enter a value into one picklist, all the picklists in all the rows get the same value. It's not putting it into the cursor in all records, but all the picklists are _displaying_ the same value. I'm trying to debug it, but it's a bit tricky since only the currently selected picklist really "exists" and the rest are just painted.
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>I know you don't have my picklist, so it may be hard to help, but I thought someone may have seen this phenomenon with other controls and have some idea what I'm doing wrong and how to fix it.