Quote Originally Posted by Nikolay
I had the same problem and the easy solution for it was suggested by UnderScore, When you exit the X while remastering close Kmix manually, in this case it won't appear on remastered version.

Nikolay
Nikolay is right. In the remastering process, when I am done using the KDE GUI, right before I end my KDE session, I right click the kmix icon in the tray and quit it. Then exit the session & continue the remastering (making the compressedFS, ISO). When I reboot off the new ISO image, the kmix icon is now minimized to the tray.