For the past couple of days, when I post a question, the WYSIWYG editor is missing and the live preview doesn't work either. Oddly, it's working here on the meta for me for some reason. I'm also getting hit with the CAPTCHA everytime I post questions. Anyone else having this problem?
Sounds like your browser has some problems -- can you try a clean install of a different browser? Also, if on Firefox, disable all plugins and run in "safe mode".