Feel free to enter here the bugs you just found.
Diff algorithm
Very simple, needs a lot of improvement as it is far from only showing minimal differences.
Rss feeds
Feed do not get proper lang information. If content is available in one lang only, it's OK. If content is available in several lang, instead of having let's say Bug[en] and Bug[fr] in feed, we have Bug[fr] and Bug[fr]. That is, the last lang entry trashes the first one.
Sub content
If alternate_title is available, use it to display sub nodes entry.
Lang display
At least in admin panel, UTF-8 is not handled OK when displaying description of lang.
WikiWord and explicit link
If one wants to make an explicit link of a WikiWord, generated xhtml is plain wrong.