Due to compatibility problems on Internet Explorer after yesterday’s
code update, I’ve temporarily disabled the Usability Initiative’s beta
advanced toolbar. If you’ve had it enabled, you’ll just get the regular
old edit toolbar until we re-enable it.
Hopefully we should have this resolved within a day or so, and it’ll be
back on for all our happy testers!
If you want to follow the fix:
https://bugzilla.wikimedia.org/show_bug.cgi?id=20668
-- brion