Thanks to the way Firefox handles dead image links by default, the Edit button isn’t clickable. I’m not sure why the button disappeared, but until it’s fixed, editing should be done in IE or something if possible, but we’ll be a bit more lenient towards doubleposters for the time being.
Yeah, I noticed the edit button’s image was dead, but I could still click it and edit my posts. 
EDIT: (<- LOL) It’s fine now.
EDIT 2: Well for me atleast. I have the latest version of Firefox, by the way.
lol, k