It would be great, if some of the help-scripts (groovy, velocity) could be placed in the documentation to get a hint where to look in case of erros, like this i mentioned in my thread regarding shortURLs:
E.g. in a separate section for debug-infos:
which modules are affected, so we can set the loglevel only on the relevant ones and not set “debug” for whole xwiki
some of the velocity/groovy scripts to get the “effective” settings easily