The new hard line-wrapping in kate can be turned off by changing the Line Length Limit to 0 in the Open/Save configuration. However, when katepart is invoked as a window in konqueror, this has to be configured every time. To reproduce, use konqueror to open a text file containing long lines in a new tab (from a web page). The dialog explaining that the lines were too long is displayed. In the new tab, configure the editor to put the line length limit to 0 and then close the tab. Open it again, and all is fine; lines are not wrapped. However, do the same thing in new konqueror window, and you get the dialog again; the line length limit has been forgotten. This gets very annoying when you commonly have text files with very long lines.
Should have mentioned: this is kate-part-4.8.1-1.fc17.x86_64
Still present in 4.8.3 Editing konquerorrc and adding Line Length Limit=0 to the [Kate Document Defaults] section therein is a workaround.
Git commit b51f7058ce33b2235711bc93b938756ac34dd90e by Christoph Cullmann. Committed on 28/10/2012 at 18:27. Pushed by cullmann into branch 'master'. write config to global config object if the part shows its config dialog via menu else simple container apps like dolphin or konqueror never can change the config M +4 -0 part/view/kateview.cpp http://commits.kde.org/kate/b51f7058ce33b2235711bc93b938756ac34dd90e