Go into the skin and make the size of the credit display a few pixels shorter. You may want to increase the y coordinate by half of the number of pixels you remove.
So if you are using the default skin, edit default.skn in Notepad and look for:
[Display3]
# Selection display
enabled=True
x=485
y=347
w=56
h=24
color=palegreen
bgcolor=202020
[Display4]
# Credit Display
enabled=True
x=485
y=299
w=56
h=24
color=palegreen
bgcolor=202020
Try changing the h setting to 20 and the y setting to 301 for both displays.
Does this help?