Your fancy new forums interface isn't working. If I search for "AllowKeyboardNavigation" I get lots of results. If I filter by the tag "Grid" I surprisingly get no results.
I imagine you are getting a significantly increased number of ticket submissions because of the inability to find threads.
Anyhow, my issue is this. I have a grid with 100% height and scrolling and AllowKeyboardNavigation="true". When the user toggles the arrow down key, subsequent items in the grid are selected, which is great. However when the item is too far down to be seen w/o scrolling, the arrow key doesn't force a scroll which makes it impossible for the user to see the selected item. I'm guessing there must be some sort of property setting or method to avoid this.