The site layout has been updated to support Opera. It’s only been tested in Opera 10.63 though, so if it looks batshit insane in whatever version of Opera you’re using, then it must not be 10.63.
In other news, Opera is batshit insane. Not only is the UI wonky and retarded, it also renders pages like it’s on crack in a funhouse mirror room. Seriously, I encountered so much insanity in the process of fixing the layout to work in Opera. Oh and the WYSIWYG development tools are fucked up, too; they’re a nuisance to use in Opera.