Since the very first version of KDE 4.0 that shipped (in Fedora at
least), I have been unable to reliably edit files with kwrite (it
complains of lack of permissions).
Luckily for me I changed web host to a company which provides SSh
access, so I have largely forgotten about this, until recently I hit
an FTP site again, and same problem.
It seems to me that KDE should be able to work with FTP and text files