Well, I have placed all the things I noticed and know in the Known Issues and Tips and Tricks. Hope this helps somebody!
Anyway, just wanted to say that I have upgraded to CxOffice 4.1, and also tested upgrading Libronix to 2.1c (? Can't remember). It works okay with CxOffice, but feels a little slower than the older version of Libronix, and it seems to keep thinking I double-click (invoking "Key Link" which I had to turn off because of that). The upgrading process had a slight hitch for me (Brett Randall, comments?), as documented in Known Issues and Tips & Tricks.
The tooltips display problem still exists, and the workaround of clicking on it still works. There are some improvements though, like some of the preferences no longer displays an error, as in CxOffice 3.x. The icons after upgrading/install works in CxOffice 4.1. Will download and test with the latest nightly and pre-release versions soon, although I am not allowed to post comments here on those.