This is a list of some of the known bugs in Pmw. On NT, Pmw. MenuBar does not display message bar help for menu items. This may be a problem with Mac version of Tk.
Balloons bind to widgets and canvas items.
This means that bindings made by other users are deleted when the balloon makes its bindings. The obvious solution is for Pmw. But this would make the unbind and tagunbind methods inconsistent - they would remove all bindings, not just the ones added by the balloon. When a Pmw. Balloon is bound to a canvas item, moving the item becomes very slow.