I'm going to call IB about this, but I wanted to know if anyone else has seen what I'm about to describe. Yesterday I had an order to sell at 37.75. I then changed it to 37.49, but the order stayed at 37.75. I then cancelled the order, and entered a new order with 37.49 as my sell limit price. Normally at this point a row will be added underneath the symbol row for order entry. However, this time there was no added row, and the number I was able to change was the bid price for the symbol underneath the one I was trading. Then my 37.49 sell limit traded against a bid at 37.00, .49 beneath my limit. This has never happened before, so I'm concerned that this might be a problem with a recent build. If this hasn't happened to you, I'm not sure you even understand what I'm describing. If you have seen this, let me know and I'll report it to IB.