2.0b3 embed code is off

I’m trying to embed a page via an iframe in Joomla.
But when doing so I get an error:
Datoformat skal være: YYYY-MM-DD, or ‘today’ or ‘yesterday’ eller et nøgleord, der understøttes af strtotime funktionen (se PHP: strtotime - Manual for mere information):
Translated that means, dateformat is wrong, it has to be: yyyy-mm-dd or ‘today’ or ‘yesterday’ or a keyword understood by strtotime
The embed code reads (it’s the live->visitors now widget):
If I change the ‘date=last7’ to ‘date=today’ it works.