Don't change your profile picture right now. Why? Because Wikia is currently experiencing a glitch with profile avatars. What happened with Sparkarez when he tried to change his was that his profile picture changed to default.
The reason why the episode navigation template doesn't collapse like it does on the Phineas and Ferb Wiki, and why the Spoiler template does not hide the spoilers like it should, is because Common.js is completely empty. Can you click here and copy and paste this code? Also, I can't do that myself, because only admins can edit content in the "MediaWiki" namespace, and I'm not an admin here, but you are.