We've pushed some updates to UploadWizard, most notably:
* disabled multiple-file selection in browsers where it didn't work
* files now start uploading immediately when selected (this can be disabled
server-side if there are problems with it)
* improved category input fields
* 'skip tutorial' step is now saved as a pref instead of a cookie -- so the
tutorial won't come back every time you switch computers anymore!
* fixes for when pre-upload thumbnails do and don't get drawn
* initial API for fetching upload campaign metadata
('action=uploadcampaign'), to be used by Wiki Loves Monuments mobile app
Don't be shy about giving feedback!
-- brion