Developer last update (2014) ... v0.9.98 (2014-07-04) ... at ... http://kdiff3.sourceforge.net/
AlternativeTo app page (2017) ... latest update was made in Feb 2017 ... ?

Developer's update (2014) is well after Kissaki's comment below , so there is a possibility kfiff3 is fixed
I would like to know if Kissaki's concerns have been addressed by the developer?
This is my first venture into text comparison, so I am a bit nervous at the reliability of jdiff3

[Edited by bawldiggle, May 04]

I was very enthusiastic about finally having found a merge tool where I could make out which changes came in from two sides against a base version when merging.
Being able to see 3 columns of base file, remote and local changes, and the resulting file is very nice.
Unfortunately, I had to notice the auto-resolving of conflicts produces wrong results. I can thus not use it in this state for solving merge conflicts sadly.