I believe that the %U is the URL of the file to edit, this would usually be a local filename or a URL such as ftp://somedomain.com/dir/file.txt.
mufuti, You probably have to set the -u option in the command for kate in the KDE menu. On my system the KDE menu command for kate is: kate -u %U This seems to work...
Thankyou Bram, this fixed my problem.
Whenever I choose to open a text file with Kate from a Konqueror file list, by right clicking and selecting 'Open with Kate' from the pop-up menu, it starts a new instance of Kate instead of using the already open Kate instance. I'm using Kate version 2.5.6 under KDE 3.5.6. It used to behave properly on previous versions but no more. When I first starting the newer version I was presented with a dialog box asking if I want to start a new session or use an existing session. I chose to use the exi...