Version:            (using KDE KDE 3.5.3)
Installed from:    SuSE RPMs

1) compare to documents

2) editing in workgroup mode -- user could be able to select default font (name, style) + color (fg+bg) for everything she/he adds, everything she/he deletes should be (for example) underlined (configurable).
From opening to closing the document, editing should be considered as one session -- date of that session should be remembered. So the user should be able to view document with changes older than a (example) week as a regular document, while newer -- as changes (reason: the user doesn't want to see that Jim disagress with something, and that somebody put the text again -- because all of that was one year ago).

2.1) compact changes -- similar to view, all too old (user decides) changes are incorporated into document and fortgotten that there were any changes -- now, all this is one document (plus newer changes)