The worst problem is that after enabling just hhvm, I can't get to beta to disable it, or to preferences.
Beta preferences error: "[304a41da] 2014-10-01 20:23:36: Fatal exception of type Scribunto_LuaInterpreterNotFoundError"
preferences preferences error: "[6353f258] 2014-10-01 20:24:04: Fatal exception of type Scribunto_LuaInterpreterNotFoundError"
my (blank) wikipedia userpage [09c88c36] 2014-10-01 20:24:36: Fatal exception of type Scribunto_LuaInterpreterNotFoundError
But... for some reason, beta now suddenly works...