Wrong entry in AddRessource.properties causes Error-message

I don't really know, what this file is exactly for, but I get a log-output
'Unparsable lastModified : @lastModified@'
when using the nightly builds of tomahawk.

Looking at the AddRessource.properties-file I see the entry
lastModified=@lastModified@
which probably causes the logging

It ought to be in a format that can be parsed from the method MyFacesRessourceLoader.getLastModified() (format = "yyyy-MM-dd HH:mm:ss Z").
So there has to be something like
lastModified=2006-03-01 15:23:34 -0400
in this file.