Did you remove or did you purge? There's a difference. (Removing is what the app managers do, and what apt-get remove does; purge is what apt-get purge does, and there's no way to do that from the app managers) Also did you switch to some other theme? Theme customizer, even if it doesn't leave an entire theme folder behind, will still have various theme changes that are cached left over in various files. Switching to a different theme should recache stuff.