This means that you are probably using a version of oacs-5-8 post the 5.8.0 release, and you upgraded either via CVS or via "upgrade from repository". From your other posting, i assume the latter. "Upgrade from repository" takes the files for the matching release, which were tagged in this particular case with "openacs-5-8-compat". OpenACS.org builds - based on the compat tags - every night .apm files which are used for upgrade. The tagging happens just occasionally and is done in the oacs-5-8 branch for the development of OpenACS 5.8.1, which will contain as well the application packages...
what can/should we do: you can either stick with the released OpenACS 5.8.0 (tar file release) or you can install via CVS using the oacs-5-8 tag to get the newest set of packages from the branch, or we (however this is) can advance the compat tags, do some testing, such that upgrade from repository will work.
