Enrique ... you have me intrigued now! What o/s are you on .. XP/Vista/Win7? It looks to me like one of the*sytem/ fonts had changed for some reason. I'm not 100% sure, but I think the only additional
font the Spitfire uses is that "hangar" one .. which (interestingly) is the only one that seems to be working properly!!
Perhaps some dev here could tell us which fonts/versions (specifically) are being used in these panels?
From looking at your screen, it really does look like the culprit is "Courier". Maybe you've picked up a non-default MS version along the way - or another (Adobe) version has taken priority. If you have another Windows machine around (with a similar o/s) see if you can compare the versions of Courier on both.
Here's my "copy" of your screengrab ...
EDIT: Drat! I knew I should have refreshed this page before posting!!!