Thank you for your post.
I can definitely duplicate the problem on Windows and Mac. I have forwarded your information to our Development and Software Quality Assurance (Testing) departments for review. If any additional information becomes available, I will post here. In the mean time, avoid using the Self function in a tooltip.
This bug still has not been addressed, in FMP11 and FMPS11.
Currently IWP cannot faithfully reproduce a layout, with tooltips, if tooltips include the use of "Self". Which is a common practice for many tooltip techniques.