Right now, I'm seeing this under DA 1.7 Beta 1. But, I've been seeing it under earlier versions, too. Sometimes, the last digit of the amount I'm paying someone for something will be missing. Specifically, under Foreign Stats | Speak To | Money/Influence, if I choose the money side of things, it will (usually) come up with the slider positioned at the amount the opposite party will accept as a valid trade. Quite often, when I accept that amount, I'll notice that what gets put down at the bottom of the screen in the list of trading assets is about 10 times as much. The last digit of the amount is simply missing in the "choose amount" dialog. Usually, I see this with large value items. I don't think I've ever seen it with values less than 1,000bc (i.e., 3 digits works fine, 4 digits has problems).
I'm running on Vista Ultimate (x86) using the latest NVidia drivers for my GeForce 7600GT video card.