@thetomester13 yes. it is about the privatebin templates, but I think it is also tricky to update these because hash-check-values for js files etc… I tested it and they will now be picked up.
I checked it now. after a new update, it is already broken. a custom theme should also have the js hash numbers to verify and after an update these (or something else changes and the new template does not work any more. so custom themes are not a good idea in the actual state of the module, how it works now. someone has to dig deeper into it to find maybe a proper solution. for now I would say, it is not a good idea to do so, like nebulon suggested already and I have now the proof for that