I upgraded my system to Leopard over New Year's and have been finishing up work on 1.1. This is good news. I was still unhappy, though with my artwork for the Back, Forward and Refresh buttons in the toolbar. So I kept trying to get them just right. THEN I discovered a way to get them perfect...and that way IS much better, but it involves scrapping all of my toolbar code and using the new toolbar features in Interface Builder. Which means rethinking some things and rewiring others. And postponing 1.1's release
The short version: We are close, very close. It will be worth it too.
1.1 will probably work in Tiger, almost certainly work in Tiger. But until we verify this, no guarantees!
[UPDATE: After chasing my tail for too long, I reverted to my original toolbar code and got all the other bugs fixed and features added and voila! 1.1 is done and available for download. New downloads require downloading 1.0.4 then having Hana check for an update for 1.1. This will be fixed in the next day or two.]