Aliasing issue in Firefox 15 #5

Aliasing performance.now to now causes an exception in Firefox:

NS_ERROR_XPC_BAD_OP_ON_WN_PROTO: Illegal operation on WrappedNative prototype object

So either now should call performance.now, or it should just use Date.getTime() and not bother about microseconds :)

(This is causing the white posts issue in the buddycloud webclient)