Description of Problem:
If I mouse over a field in contacts which is too long to be displayed, a 
grey box appears with the expanded name. This part is fine.

However, if I then use the keyboard to switch to another virtual desktop, 
then the grey box stays visible, even if I subsequently move the mouse!

It will only disappear if I return to the original desktop (regardless of 
mouse position).

Steps to reproduce the problem:
1. Move the mouse over any contact ending in ..., forcing the popup window
2. Switch to another desktop using the keyboard
3. Now move the mouse all you want, the box is not going to move

Actual Results:
The box won't disappear.

Expected Results:
The box disappears when not over the evolution contacts window.

How often does this happen? 
100%.

Additional Information:
Running windowmaker, which is not gnome compliant, but I think that only 
matters for putting icons on the desktop.