Mouse disappears when over active window when typing in WinXP Guest

[Keebs]

Using a windows 7 pro host running virtualbox 4.3.26 running a windows xp guest os in fullscreen mode. Due to an antiquated management system, resolution on the monitor being used for virtualbox is 800x600, though I don't think this matters. To replicate the problem, open notepad (or any program really), position the mouse over the notepad window and start typing. the mouse dissapears until you move it. Now move the mouse outside the notepad window and type - the mouse remains visible the entire time. I've reproduced on multiple computers, hosts, guests, and monitors. To me this is trivial, but to several users this is major as they "lose" the mouse and have to "refind" it all day long.