issue 1: it is a problem when subst_blank is turned on and off with pre-existing pages. xowiki does not change all names automatically when the flag is changed, since the mapping is not bijective. If the flag is turned on, editing the page will automatically translate spaces into underscores in the name of this page; no manual renaming is required.
issue 2: doing so will ulgify typed links (such as glossary links). The right thing is to use another variable normalized_name for the result of the normalizing method and use stripped_name for the label and normalized_name in the arguments of the link object.
issue 3: right. the better fix is to use list around the base argument of export_vars (3 times). this allows as well square brackets.
I'll polish the current work with the File class in xowiki and commit this together in the next few days.
-gustaf
