I have a strange issue with whisper menu (Xubuntu 14.04, 64bit). I like to set a custom icon for it (a penguin) instead of the default rat. As soon as I do this, I find that the menu button take a long time to appear on the panel after I log in - several minutes. If I add a second whisper menu to the panel, this one appears immediately until I change the icon.
Has anyone else seen this? Found a solution, even?