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.
When running Pmw demos under ptui the busy cursor does not appear. If a combobox has a horizontal scrollbar and it displays its listbox above the entry, then it is misplaced. Bug in Pmw. Bug in Pmw. Also right hand side border is missing.