Occasionally the cursor appears to be part of a pointer (arrow) cursor and part of a text-select (capital-i shape) cursor. I'm afraid I can't reproduce it on demand, it may be only when using Firefox but I think it's just a general issue; also I can't screenshot it as the action of doing so resets the cursor and the error disappears. kde-runtime is 4:15.08.2-0ubuntu1 ("Help > About KDE" no longer gives version information for some reason). Reproducible: Sometimes Steps to Reproduce: 1. use KDE for some time and it appears. Actual Results: Cursor image is wrong, almost as if it's two cursors masked and mashed together. Expected Results: Cursor shows one form or another and not a mix of two. Nothing relevant to add.
The cursor is rendered by the video drivers for the X11 server. Please report this issue to the developers of your video drivers.