Thread:Extension talk:Maps/Error: Parameter coordinates must be one or more valid locations

Hi all, I receive the above error message on those map examples w/o given coordinates. Example: --> http://mytrips.feldts.de/index.php?title=Maptest Hence I assumed this to be related with a geocoding problem, this is what I tried to isolate the problem: My setup: MediaWiki 1.20.0, PHP 5.3.8, Semantic Forms 2.5.1 Semantic Maps 2.0.1.2, Semantic MediaWiki 1.8.0.1, Semantic Result Formats 1.8, Maps 2.0.1, Validator 0.5.1, Widgets 0.10.0, Skin: Cavendish MW
 * entered GM JS V3 API key in "extensions/Maps/Maps_Settings.php" --> No change (in between there was a Google Error Message about a wrong key, I recreated a browser key for "all referrers" and no such message again)
 * created login for geonames.org, selected this to be the default geocoding service in "extensions/Maps/Maps_Settings.php" --> No change
 * disabled all unnecessary modules in "LocalSettings.php" and left only Validator/Maps --> No change
 * fall back to "Standard" skin --> No change

Observations: When I started to try it out I know for sure that some tested examples were fine, but the same unchanged example suddenly stopped working. Here is when I started to google the error and found hints to use an API key. I can see the API usage report and it looks ok, no limits exceeded, no blocking...

I'm lost and just hope its something very stupid I have overlooked or that it is somehow MW 1.20 related?