There seems to be two bugs related to the April Fool's Day event this year for the Mac OS Version of the game. Before anyone asks - yes, my CC is currently updated to the latest version for Mac OS. Here are the bugs:
1. April Fool's Day items appear as broken links (at least the glasses do, I'm not sure about the backpack).
2. Loading a realm with users in it wearing the April Fool's Day items or loading a realm with a mannequin wearing the April Fool's Day items causes the game to crash.