Error after upgrade to 2.3. snapshot version

Hi I just upgraded my 2.2. snapshot version to 2.3.snapshot using apt-get install which seemed to have worked quite good except that I now get every now and then this error

23:49:03.990 [ERROR] [.core.karaf.internal.FeatureInstaller] - Failed installing 'openhab-package-"standard"': No matching features for openhab-package-"standard"/0.0.0

23:56:03.896 [ERROR] [.core.karaf.internal.FeatureInstaller] - Failed installing 'openhab-package-"standard"': No matching features for openhab-package-"standard"/0.0.0

What does that mean?

An error in a config file. Have a look here.