What did you do to cause this? Accessed the installer with Internet Explorer 9.
What page were you on? http://my.site.com/traq/install/
What PHP and MySQL versions do you run? (client side issue)
Describe the defect: Style sheet loads, but displays incorrectly with Internet Explorer 9.
Page renders OK in Firefox 15 on Windows 7. (attached)
This is because Internet Explorer never has, and never will, be supported.
I refuse to go out of my way to fix Microsoft's incompetence.
I like your train of thought. :)
Attached screenshot.