Version: 3.3.1 (using KDE KDE 3.5.1) I've edited the toolbar (removed the "print" button) and then I noticed that whenever I switched the open document window, a item from the toolbar was removed. That behaviour repeats until the toolbar is completely emptied.
I've noticed that the same exact behaviour occurs when loading projects which have different toolbar configurations. In my case, I had a project which had the "Clean Project" button inserted on the buildToolBar and another which had a default toolbar. When I switched projects I've noticed that the buildToolBar had had shrunk. After performing the same function multiple times (reopening another project) I've noticed that the toolbar buttons were being deleted one by one with each project reopening.
Yup. This one is still with us in current SVN and KDE-3.5.5. Sigh.
Dupe against bug #118722 *** This bug has been marked as a duplicate of 118722 ***