Empty Folders...???

[saldach]

Today while i was playing i noticed some things weren't happing or going right, and when i logged out and checked my add-ons everything seemed ok... then i went and check the folders, on a wild hunch, and noticed that what wasn't working ingame had empty folders that were not empty yesterday... ei: CustomTooltip, MonkeyQuest, QuestHistory, SmartPet, just to name a few... i'm going to try to replace the folders but was wondering what could've caused this...???