Testcase: Dirk Jesse [17.06.08 ] highresolution.info
Bug Details: It seems that Firefox 3.0 final has a problem (at least under Windows Vista) with quotation marks in Italics and larger font sizes when using font family "Times New Roman", Times, serif. The leading quotation mark overlaps the next character at font-sizes larger then 20px.
Screenshot:

Live Demonstration:
Paragraph with "quoted text". (font-size: 10px)
Paragraph with "quoted text". (font-size: 11px)
Paragraph with "quoted text". (font-size: 12px)
Paragraph with "quoted text". (font-size: 14px)
Paragraph with "quoted text". (font-size: 16px)
Paragraph with "quoted text". (font-size: 18px)
Paragraph with "quoted text". (font-size: 20px)
Paragraph with "quoted text". (font-size: 24px)
Paragraph with "quoted text". (font-size: 30px)
Paragraph with "quoted text". (font-size: 36px)
Paragraph with "quoted text". (font-size: 48px)