FireFox 3.6.6 Is not cascading stylesheets properly.

Question

== Issue
==
I have another kind of problem with Firefox
== Description
==
In order for CSS to cascade properly, CSS style sheets need to have styles specifically identified under a cascading hierarchy so they apply to one and ONLY one element on the page. For example: '#tubemenu a:link, a:visited { ... }' in a style sheet should apply styling to an address link identify by 'id = "tubemenu"'. However, not only does it work on that link, but it will apply its styling to EVERY address link thereafter that has been visited. This is not proper. This did not happen until v3.66.
Safari draws right. IE8 draws wrong. FireFox draws wrong. IE6 draws right.
The only way to fix it is to encode the style this way: '#tubemenu a:link, #tubemenu a:visited { ... }'.
Very frustrating.
== This happened
==
Every time Firefox opened
== Immediately following upgrade to v3.66
==
== Troubleshooting information
==
Application Basics
Name Firefox
Version 3.6.6
Profile Directory
Open Containing Folder
Installed Plugins
about:plugins
Build Configuration
about:buildconfig
Extensions
Name
Version
Enabled
ID
RealPlayer Browser Record Plugin 1.1.3 true
Firebug 1.5.4 true [email protected]
Password Exporter 1.2 false
Modified Preferences
Name
Value
accessibility.typeaheadfind.flashBar 0
browser.history_expire_days.mirror 180
browser.places.importBookmarksHTML false
browser.places.importDefaults false
browser.places.leftPaneFolderId -1
browser.places.migratePostDataAnnotations false
browser.places.smartBookmarksVersion 2
browser.places.updateRecentTagsUri false
browser.startup.homepage http://www.google.com/#hl=en&q=%2B%22benchtop+injector%22&btnG=Google+Search&aq=f&oq=%2B%22benchtop+injector%22&fp=1&cad…
browser.startup.homepage_override.mstone rv:1.9.2.6
dom.disable_window_flip false
extensions.lastAppVersion 3.6.6
network.cookie.prefsMigrated true
places.last_vacuum 1277269759
print.print_printer KONICA MINOLTA magicolor 2430DL
print.printer_CutePDF_Writer.print_bgcolor true
print.printer_CutePDF_Writer.print_bgimages true
print.printer_CutePDF_Writer.print_command
print.printer_CutePDF_Writer.print_downloadfonts false
print.printer_CutePDF_Writer.print_edge_bottom 0
print.printer_CutePDF_Writer.print_edge_left 0
print.printer_CutePDF_Writer.print_edge_right 0
print.printer_CutePDF_Writer.print_edge_top 0
print.printer_CutePDF_Writer.print_evenpages true
print.printer_CutePDF_Writer.print_footercenter
print.printer_CutePDF_Writer.print_footerleft &PT
print.printer_CutePDF_Writer.print_footerright &D
print.printer_CutePDF_Writer.print_headercenter
print.printer_CutePDF_Writer.print_headerleft &T
print.printer_CutePDF_Writer.print_headerright &U
print.printer_CutePDF_Writer.print_in_color true
print.printer_CutePDF_Writer.print_margin_bottom 0.300000011920929
print.printer_CutePDF_Writer.print_margin_left 0.300000011920929
print.printer_CutePDF_Writer.print_margin_right 0.300000011920929
print.printer_CutePDF_Writer.print_margin_top 0.300000011920929
print.printer_CutePDF_Writer.print_oddpages true
print.printer_CutePDF_Writer.print_orientation 0
print.printer_CutePDF_Writer.print_pagedelay 500
print.printer_CutePDF_Writer.print_paper_data 1
print.printer_CutePDF_Writer.print_paper_height 11.00
print.printer_CutePDF_Writer.print_paper_size_type 0
print.printer_CutePDF_Writer.print_paper_size_unit 0
print.printer_CutePDF_Writer.print_paper_width 8.50
print.printer_CutePDF_Writer.print_reversed false
print.printer_CutePDF_Writer.print_scaling 0.90
print.printer_CutePDF_Writer.print_shrink_to_fit false
print.printer_CutePDF_Writer.print_to_file false
print.printer_CutePDF_Writer.print_unwriteable_margin_bottom 0
print.printer_CutePDF_Writer.print_unwriteable_margin_left 0
print.printer_CutePDF_Writer.print_unwriteable_margin_right 0
print.printer_CutePDF_Writer.print_unwriteable_margin_top 0
print.printer_KONICA_MINOLTA_magicolor_2430DL.print_bgcolor true
print.printer_KONICA_MINOLTA_magicolor_2430DL.print_bgimages true
print.printer_KONICA_MINOLTA_magicolor_2430DL.print_command
print.printer_KONICA_MINOLTA_magicolor_2430DL.print_downloadfonts false
print.printer_KONICA_MINOLTA_magicolor_2430DL.print_edge_bottom 0
print.printer_KONICA_MINOLTA_magicolor_2430DL.print_edge_left 0
print.printer_KONICA_MINOLTA_magicolor_2430DL.print_edge_right 0
print.printer_KONICA_MINOLTA_magicolor_2430DL.print_edge_top 0
print.printer_KONICA_MINOLTA_magicolor_2430DL.print_evenpages true
print.printer_KONICA_MINOLTA_magicolor_2430DL.print_footercenter
print.printer_KONICA_MINOLTA_magicolor_2430DL.print_footerleft &PT
print.printer_KONICA_MINOLTA_magicolor_2430DL.print_footerright &D
print.printer_KONICA_MINOLTA_magicolor_2430DL.print_headercenter
print.printer_KONICA_MINOLTA_magicolor_2430DL.print_headerleft &T
print.printer_KONICA_MINOLTA_magicolor_2430DL.print_headerright &U
print.printer_KONICA_MINOLTA_magicolor_2430DL.print_in_color true
print.printer_KONICA_MINOLTA_magicolor_2430DL.print_margin_bottom 0.300000011920929
print.printer_KONICA_MINOLTA_magicolor_2430DL.print_margin_left 0.300000011920929
print.printer_KONICA_MINOLTA_magicolor_2430DL.print_margin_right 0.300000011920929
print.printer_KONICA_MINOLTA_magicolor_2430DL.print_margin_top 0.300000011920929
print.printer_KONICA_MINOLTA_magicolor_2430DL.print_oddpages true
print.printer_KONICA_MINOLTA_magicolor_2430DL.print_orientation 0
print.printer_KONICA_MINOLTA_magicolor_2430DL.print_pagedelay 500
print.printer_KONICA_MINOLTA_magicolor_2430DL.print_paper_data 1
print.printer_KONICA_MINOLTA_magicolor_2430DL.print_paper_height 11.00
print.printer_KONICA_MINOLTA_magicolor_2430DL.print_paper_size_type 0
print.printer_KONICA_MINOLTA_magicolor_2430DL.print_paper_size_unit 0
print.printer_KONICA_MINOLTA_magicolor_2430DL.print_paper_width 8.50
print.printer_KONICA_MINOLTA_magicolor_2430DL.print_reversed false
print.printer_KONICA_MINOLTA_magicolor_2430DL.print_scaling 0.90
print.printer_KONICA_MINOLTA_magicolor_2430DL.print_shrink_to_fit false
print.printer_KONICA_MINOLTA_magicolor_2430DL.print_to_file false
print.printer_KONICA_MINOLTA_magicolor_2430DL.print_unwriteable_margin_bottom 0
print.printer_KONICA_MINOLTA_magicolor_2430DL.print_unwriteable_margin_left 0
print.printer_KONICA_MINOLTA_magicolor_2430DL.print_unwriteable_margin_right 0
print.printer_KONICA_MINOLTA_magicolor_2430DL.print_unwriteable_margin_top 0
privacy.cpd.siteSettings true
privacy.sanitize.migrateFx3Prefs true
privacy.sanitize.timeSpan 0
security.warn_viewing_mixed false
== Firefox version
==
3.6.6
== Operating system
==
Windows 7
== User Agent
==
Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.6) Gecko/20100625 Firefox/3.6.6
== Plugins installed
==
*-Shockwave Flash 10.1 r53
*Adobe PDF Plug-In For Firefox and Netscape
*6.0.12.732
*RealPlayer(tm) LiveConnect-Enabled Plug-In
*RealJukebox Netscape Plugin
*The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
*Default Plug-in
*iTunes Detector Plug-in
*Yahoo Application State Plugin version 1.0.0.7
*3.0.40624.0
*NPWLPG
*RealPlayer(tm) HTML5VideoShim Plug-In
*Version 1.0.5, copyright 1996-2010 The VideoLAN Teamhttp://www.videolan.org/
*Next Generation Java Plug-in 1.6.0_14 for Mozilla browsers

Answer 1

Your CSS is wrong. :-|
#tubemenu a:link, a:visited { ... }
applies styles to two sorts of elements.
1) a:links inside an element with the id tubemenu
2) a:visiteds anywhere.
The comma is used to separate two different selectors which happen to have the same styling. When you put a comma in, you are starting again. Nothing gets held over from the previous selector. If other browsers are doing that, they are wrong.
What you want is:
#tubemenu a:link:visited { }
if you want to apply it only to links which are both unvisited and visited (i.e. nothing!), or:
#tubemenu a:link, #tubemenu a:visited {}
if you want it to apply to both unvisited links inside #tubemenu and visited links inside #tubemenu.
Gerv