Firefox/Flash 9 Issue Transparency?

[microtribe]

I think the newest Flash player breaks Flash transparency in Firefox. I have a machine with XP and an older Flash player and this site appears fine in Firefox: http://www.terrystoffee.com . But on my Vista box with the newest Flash player, no transparency - you can see white backgrounds. See example of screenshot here if you can't recreate problem yourself: http://www.terrystoffee.com/firefoxtransscreenshot.gif (white box shouldn't appear). Can anyone offer help, confirmation or advice?

PS this same issue happens while using object/embed method and also with swfobject method of embedding.

[atomic]

Following your post, I installed FF on another machine running Vista...

I then visited your posted link and was told that Flash player plug-ins were needed...

Automatic install failed, but after I then manually installed the FF Flash plug-ins, and then re-visited your link, everything appeared looking fine and with transparency...

You might want to check if you have the latest plug-ins for FF, and if they were properly installed...