I updated to the latest Adobe Reader8 the other day for testing with the latest Kidrocket and Wow!
Its the first time I can remember thinking, "Now that update was really worth it!"

It looks and works so nice with Starfall in the browser, just happens to almost exactly match the grey Kidrocket interface too.
Screenshot: http://kidrocket.org/img/starfall_pdf500.jpg
I swear it was totally by chance lol Its hard to tell where Kidrocket stops and the Reader begins?

I highly suggest you grab the free update and try it out...
http://www.adobe.com/products/acrobat/readstep2.html

You can't currently update from within the Kidrocket browser, so fire up Internt Explorer and update it by following the link above.