Menu woes
If you've recently tried to use my top navigation bar, you may have encountered problems with the sub-menus disappearing as you try to move the pointer down into the sub-menu. I'm still working on that (I know the change that caused the problem is that I'm now using a custom menu for the navigation rather than the default, but I haven't yet found a suitable fix.
Still this is a normal kind of debugging!
Fixed by modifying the theme to move the sub-menu up by one pixel, so that there isn't a near invisible gap between the main menu and the sub-menu.