In Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.7) Gecko/20040610 Firefox/0.8.0+ the about:plugins page appears totally unstyled.
WFM: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7) Gecko/20040610 Firefox/0.8.0+
Me too, I've just realised it's because I'm using the Qute theme, I forgot that's not the default theme anymore, oops! Anyway it works fine in Winstripe. Theme problem -> INVALID