Calendar not correctly visible

[Bob Alexander]

When I am entering an expense and use the click down arrow near the date 
  a small calendar shows up. Use it to select a date, enter the expense.

Next riw, click on the date arrow again, the calendar rectangle shows 
but it is all white and shows what is supposed to be there only when I 
pass over with the mouse or hit the next/previous month arrow and redraw 
the whole thing.

Anyone experiencing this ?

Gnucash 1.8.10-12 package on a mostly Gnome (mostly 2.10 packages) 
Debian unstable system.

TIA,Bob.