Tooltips and PropertyManagerPage2::AddTab()

I've got an addin with several PropertyManagerPages and I canget tooltips to properly display on all of my buttons, checkboxes,etc, but if I define 'tabs' on a Page (so that I can have'sub-pages', essentially) tooltips will not work on those tabs.
Has anyone run into this before?
(Using SW2008/2009/2010Beta API)SolidworksApi macros