FuBar seems to have broken. All I get is the actual bar across the top of the screen - none of the plugins will load.
It's been broken since I updated the client to patch 3.3.5; however I loaded WoW onto my other older computer and downloading the addons from there worked fine, including FuBar and plugins.
I've tried reloading out-of-date addons and restarting WoW, but I still don't have much joy.