When you change the config files for the IconBox, the behavior doesn't change. No matter what you do to the configuration files, the behavior stays the same. I've tried manually altering them, and altering them with XFCE Settings
Additional information: I'm using XFCE 4.0.4, and the new GTK2.
Bug closed: Sorry, I mixed up iconbox and taskbar. BUG CLOSED
mass reassign from zz-do-not-use to general, so i can remove the zz-do-not-use component. sorry for the spam, search for this string to filter these: fis7cldoq35p3kjdu74emc
Move bug to Window Buttons; the merge of tasklist and iconbox.