As of today (Sept, 9 2014) the 1.8 version of the YrNo MetNo API is non-functional anymore.
There are still forecast scripts which use this 1.8 version call and a small change makes these scripts, partly functional, again.
Scan the scripts source for a text string containing the version number. Should look like
. . . /weatherapi/locationforecast/1.8/?lat= . . .
and change that
. . . /weatherapi/locationforecast/1.9/?lat= . . .
Than check the scripts download location if a new version is available.
The 1.8 to 1.9 change also brings more weather-icons and a different naming of the conditions (ALL-CAPITAL to Camel-Case).
Wim