The flip header option no longer works

Blender is a very ittitating application in that it doesn’t behave reliably. One day the zoom function is fine, the next it’s out of control. One day I can flip the header and now nothing happens. WTF?

Does anyone know what this may be caused by - header flip, not the flippin mouse wheel

User Preferences > System > Miscellaneous > Disable Annoy Mode

That would be one helluva plugin!