I need a WYSIWYM markdown editor for my web application and I heard WMD was the obvious choice.
To my surprise WMD breaks in IE8. What other option do I have, or is there a version that's been tested on IE8 and is compatible?
Check out wmd-new. According to its website:
This version of WMD has been tested with IE 6, 7 and 8 RC1, Firefox 3, Safari 3.2, Chrome 1.0 and Opera 9.6. iPhone and iPod Touch support is rumored to work with the exception of the link/image prompt location. There are a few (minor) known issues with keyboard handling in IE and Opera. See the issues page for more details.
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NOTE
Version 2.0 of this code was developed as a private bugfix/feature branch for Stackoverflow.com and is missing most of the optional features found in the original WMD as SO did not use them. Now that I'm putting this out on Google Code I'll be adding the new features back in v2.1 due out sometime in February 2009. Version 3.0 should be released in February/March 2009 and will a major rewrite making use of jQuery.
EDIT: I didn't notice it immediately but this project hasn't release any source code.
EDIT2: As pointed out by warren in a comment, a "Stack Overflow branch of WMD" is hosted on github. See Reverse Engineering the WMD Editor for more details.