When I run it, ten blank tabs appear at the top of the window. These tabs contain the respective "pages" of the installer window that would normally appear one at a time. The third tab from the left displays a dialogue that is almost totally blank. Additionally, "OK" and "Apply" buttons appear at bottom instead of the correct "Back" and "Next." I can still run the installer, albeit by having to select each tab one at a time myself.
I first noticed this when installing Firefox 1.0.4, but then noticed that my downloaded installers of other recent Firefox and Thunderbird releases behaved like this as well, even though they had once behaved normally on my computer.
What could be the cause of this odd problem? Or is this what I get for using an operating system that's not "officially supported?"
UserAgent: Mozilla/5.0 (Windows; U; Win95; en-US; rv:1.7.8) Gecko/20050511 Firefox/1.0.4


