Not a bug
BYOND Version:493
Operating System:Windows 7 Ultimate 64-bit
Web Browser:Chrome 19.0.1084.30
Applies to:Dream Maker
Status: Not a bug

This is not a bug. It may be an incorrect use of syntax or a limitation in the software. For further discussion on the matter, please consult the BYOND forums.
Descriptive Problem Summary:
When using a font other then Courier, the dm editor, becomes unusable, as text overlaps, and various other graphical glitches occur.
Numbered Steps to Reproduce Problem:
Go to Options->Code Preferences and change the font to something else.

Expected Results:
Readable text in the dm editor regardless of the font I pick.
Actual Results:
I'm limited to only Courier as far as I can tell, the ones I've tried (Times New Roman, Arial, and a few random ones), result in the dm editor becoming an unreadable mess.
Does the problem occur:
Every time? Or how often?
Every Time as far as I can tell
On other computers?
I've seen it on someones Windows XP computer
When does the problem NOT occur?
When I leave the font on it's default
Did the problem NOT occur in any earlier versions?
No idea

You need to use a mono-space font. This has been linked to before on these forums, if I recall correctly.
Would it be possible to limit the selection to compatible fonts?
Lummox JR resolved issue (Not a bug)