Version: 1.12.4 (using 4.3.4 (KDE 4.3.4), Debian packages) Compiler: cc OS: Linux (i686) release 2.6.33-2.slh.6-sidux-686 In the filter dialogue, I defined an icon for "mark as spam" and enabled "display in tool bar". Then I configured my tool bar, adding the corresponding filter action. The icon + action is displayed in the "customize tool bar" dialogue (on both sides), but the toolbar itself does not display the icon (or a text button) for this filter action.
*** This bug has been marked as a duplicate of bug 190827 ***