At the risk of sounding like I’m beating a dead horse, let me report that the Bush “poster” tool fails to work on PCs using Mozilla.
The behavior is exactly the same as Mac/Safari — constant page refresh with no poster creation or error message (such as, “This tool works only on Windows machines and MSIE”).
I was able to get the tool to work with this machine (Win2000/MSIE 6.0) at 1.38 pm Friday (Seattle time).