From Todd McDaniel at Dynavistics comes a set of bizarre bugs in GP 10. When you maximize certain windows in GP, hidden fields become not only visable, but the user can interact with them. This are definitely reproduceable in 10.0 but I haven't tried with SP1 installed yet.
For example, go to Cards-Purchasing-Vendor. Pick a vendor. Maximize the window. At the bottom you'll see a bunch of hidden fields. If you go to Cards-Fixed Assets-General, pick an asset and maximize the window you get not only hidden fields but hidden buttons that work, including a delete button. oops! That might keep a few people up a night.
I tested this on a vanilla install, no 3rd party code, using the Fabrikam test DB. No sign of any KB's on this on Partnersource or Customersource.
Update: This is fixed in SP1.