Replying to my own posts again - second sign of madness!
From earlier post, Gustaf replied:
"Anyhow, it is not likely that the mktree renderer is a good choice for rendering menus. Furthermore, "Category instproc render_category ... " is gone since early this year and has been replaced by some more generic tree renderer classes (in tree-procs.tcl) which are used for various purposes in xowiki (not only for categories). The right approach seems to be write your own tree renderer and pass the tree-renderer via "-style" to the categories includelet. This way, you can use arbitrary CSS classes and you can freely add / remove divs without breaking anything else."
( https://openacs.org/forums/message-view?message_id=2984332 )
So I am at least poking around in the correct code when playing with the TreeRenderer, (although I am not sure if 'categories instproc render' is also deprecated).
What I still have not identified is the reason why my exploratory changes, including some intended to sabotage the thing altogether(!), make no difference. Is the page content caching working against me here?
R.
