scale graphics problem.

[e97249 essec fr]

Hi,

I've noticed some problems with scales (horizontal and vertical) in GUIs built
with Glade (possibly in general too): The higher and lower pixels of the digits
dont't dissapear when moving the trough. As a result, it looks pretty messy.

I'm on Linux Debian 2.2.15 with XFree864.0.1 and blackbox as a window manager .
gnome  does the same effect.

Thanks , Vincent.