How about just generally getting around the UI without a mouse?
I find some cul-de-sacs here and there:
ctrl+F sends focus to the search bar, but I cannot get out of the search bar without the mouse. the [Tab] key just places little squares in the search field.
The tag window is another area I can't get out of without the mouse, I'm also pretty sure I can't get into it without the mouse either.
Am I correct in thinking that it's not possible to sit down and flit around all areas of the library/GUI using just the keyboard?