Steps to repro 1. Open menu, open xfce4-settings-manager (or logout, one of 4 availible buttons) 2. Open whisker again - this button is highlighted! (visible very good with mint-x theme) version 1.5.1, on 1.5.0 there were no such bug
Fixed in 4f732a1.
*** Bug 12551 has been marked as a duplicate of this bug. ***