I notice that if I try to add a blank line at the top of a KWrite document (to type text in immediately afterward), something slightly odd happens. So I have the cursor at the beginning of the document (first line, left corner). From there, I hit Enter to create a blank line. Well, KWrite apparently creates the blank line but does not display it, and the cursor remains at its current position. I must then hit Ctrl-Home to move the cursor up to the blank line, which of course displays it.
I find this a somewhat silly procedure. It's not what happens in the other word processors I use. I don't suppose there's any way I can change it?

I can't duplicate this.

Open kwrite, cursor is at top left
enter...cursor moves down one line, leaving an empty line above it. up/down arrows re-position the cursor as one would expect. Pageup and pagedown also work predictably.

I don't find anything surprising in how kwrite works on my system.

I mistakenly said two of those things were unusual, when I should have said only one was. I just remembered that the cursor doesn't automatically move up to the blank line in any editor--I don't know what I was thinking. But KWrite doesn't display the blank line I just created until I press Ctrl-Home; I guess I should call it moving the carriage up.
I just compared this to my pre-Linux text editor, Windows Notepad. If I create a blank line at the top of the file in Notepad, of course the cursor doesn't automatically move upward either, but it does move the carriage up as needed to display the blank line. KWrite--my KWrite, anyway--doesn't do this, and I'd prefer it to. If yours does, I suppose mine could have something wrong with it (corrupted program file?), but I really don't think so--it doesn't appear to have any other problems whatsoever.