AH HA! The fix is this!

You need to put these two files in your Published/CustomMaps directory:

http://dfbredirect.dfbgaming.com/UT3/utstats2.u
http://dfbredirect.dfbgaming.com/UT3/WebAdmin.u

Demos work again! Everything works! HAPPY FACE!

BIG BIG MASSIVE INCREDIBLY HUGE THANKS TO EMAC! THE MAN! SO THE MAN! EMAC THE MAN!