Sometimes I got 2 program icons at same position on panel. The problem disappears after starting a new application (but sometimes is there again after closing that app). Because of this, it is difficult for me to make a snapshot from the situation. Reproducible: Always Steps to Reproduce: I've no idea what tiggers this misbehaviour. Actual Results: 2 program icons at the same position on panel Expected Results: All running programs should get an non-overlapping position on the panel.
Still there in kubuntu-backports of KDE 4.9 [https://launchpad.net/~kubuntu-ppa/+archive/backports] for Ubuntu 12.04 (precise) amd64 version 4:4.9.1
Suppose you are actually referring to the taskbar when saying "panel" *** This bug has been marked as a duplicate of bug 293687 ***