I added conditionals to your properties. @displayed_object_id@ and @header stuff@ are not always defined it was giving an error.
We want to keep theme-selva independent of dotlrn so plain openacs sites can also use it. It is ok to use translation from other packages as long as it doesn't add an undesired dependency. This is particularly important for dotlrn keys.
we don't want people having to install dotlrn just for the definition of 2 keys.