Persistent FFX crash (with dynamic pages?)

I am running FFX 3.6.13 over XP (for full details see attached) on a Sony VGC-VA1

Whenever I go to a dynamic page (ie one with scrolling ads or some other kind of motion in) I get the following error:

Instruction at "0x7c916333" referenced memory at "0x00000084". The memory could not be "written".

A good example is http://www.jazzfm.com/, but it's by no means limited to that.

It doesn't do this with IE8 :-( which I think makes it an FFX issue. Bug??

Suggestions?

The Config is:

  Application Basics

        Name
        Firefox

        Version
        3.6.13

        Profile Directory

          Open Containing Folder

        Installed Plugins

          about:plugins

        Build Configuration

          about:buildconfig

  Extensions

        Name

        Version

        Enabled

        ID

        Java Console
        6.0.13
        true
        {CAFEEFAC-0016-0000-0013-ABCDEFFEDCBA}

        Java Console
        6.0.15
        true
        {CAFEEFAC-0016-0000-0015-ABCDEFFEDCBA}

        Java Console
        6.0.17
        true
        {CAFEEFAC-0016-0000-0017-ABCDEFFEDCBA}

        Java Console
        6.0.20
        true
        {CAFEEFAC-0016-0000-0020-ABCDEFFEDCBA}

        British English Dictionary
        1.19.1
        true
        <email address hidden>

        Norton IPS
        2.0
        true
        {BBDA0591-3099-440a-AA10-41764D9DB4DB}

        Norton Toolbar
        4.6
        false
        {2D3F3651-74B9-4795-BDEC-6DA2F431CB62}

        Java Quick Starter
        1.0
        true
        <email address hidden>

        Java Console
        6.0.21
        true
        {CAFEEFAC-0016-0000-0021-ABCDEFFEDCBA}

        Java Console
        6.0.22
        true
        {CAFEEFAC-0016-0000-0022-ABCDEFFEDCBA}

        Java Console
        6.0.24
        true
        {CAFEEFAC-0016-0000-0024-ABCDEFFEDCBA}

  Modified Preferences

      Name

      Value

        accessibility.blockautorefresh
        true

        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
        ***********

        browser.startup.homepage_override.mstone
        rv:1.9.2.13

        dom.disable_open_during_load
        false

        extensions.lastAppVersion
        3.6.13

        network.cookie.prefsMigrated
        true

        places.last_vacuum
        1297935994

        print.print_printer
        HP Deskjet 5900 Series

        print.printer_HP_Deskjet_5900_Series.print_bgcolor
        false

        print.printer_HP_Deskjet_5900_Series.print_bgimages
        false

        print.printer_HP_Deskjet_5900_Series.print_command

        print.printer_HP_Deskjet_5900_Series.print_downloadfonts
        false

        print.printer_HP_Deskjet_5900_Series.print_edge_bottom
        0

        print.printer_HP_Deskjet_5900_Series.print_edge_left
        0

        print.printer_HP_Deskjet_5900_Series.print_edge_right
        0

        print.printer_HP_Deskjet_5900_Series.print_edge_top
        0

        print.printer_HP_Deskjet_5900_Series.print_evenpages
        true

        print.printer_HP_Deskjet_5900_Series.print_footercenter

        print.printer_HP_Deskjet_5900_Series.print_footerleft
        &PT

        print.printer_HP_Deskjet_5900_Series.print_footerright
        &D

        print.printer_HP_Deskjet_5900_Series.print_headercenter

        print.printer_HP_Deskjet_5900_Series.print_headerleft
        &T

        print.printer_HP_Deskjet_5900_Series.print_headerright
        &U

        print.printer_HP_Deskjet_5900_Series.print_in_color
        true

        print.printer_HP_Deskjet_5900_Series.print_margin_bottom
        0.5

        print.printer_HP_Deskjet_5900_Series.print_margin_left
        0.5

        print.printer_HP_Deskjet_5900_Series.print_margin_right
        0.5

        print.printer_HP_Deskjet_5900_Series.print_margin_top
        0.5

        print.printer_HP_Deskjet_5900_Series.print_oddpages
        true

        print.printer_HP_Deskjet_5900_Series.print_orientation
        0

        print.printer_HP_Deskjet_5900_Series.print_pagedelay
        500

        print.printer_HP_Deskjet_5900_Series.print_paper_data
        9

        print.printer_HP_Deskjet_5900_Series.print_paper_height
        11.00

        print.printer_HP_Deskjet_5900_Series.print_paper_size
        84

        print.printer_HP_Deskjet_5900_Series.print_paper_size_type
        0

        print.printer_HP_Deskjet_5900_Series.print_paper_size_unit
        1

        print.printer_HP_Deskjet_5900_Series.print_paper_width
        8.50

        print.printer_HP_Deskjet_5900_Series.print_printer
        HP Deskjet 5900 Series

        print.printer_HP_Deskjet_5900_Series.print_reversed
        false

        print.printer_HP_Deskjet_5900_Series.print_scaling
        1.00

        print.printer_HP_Deskjet_5900_Series.print_shrink_to_fit
        true

        print.printer_HP_Deskjet_5900_Series.print_to_file
        false

        print.printer_HP_Deskjet_5900_Series.print_unwriteable_margin_bottom
        0

        print.printer_HP_Deskjet_5900_Series.print_unwriteable_margin_left
        0

        print.printer_HP_Deskjet_5900_Series.print_unwriteable_margin_right
        0

        print.printer_HP_Deskjet_5900_Series.print_unwriteable_margin_top
        0

        privacy.clearOnShutdown.cookies
        false

        privacy.clearOnShutdown.downloads
        false

        privacy.clearOnShutdown.formdata
        false

        privacy.clearOnShutdown.history
        false

        privacy.cpd.cookies
        false

        privacy.sanitize.migrateFx3Prefs
        true

        privacy.sanitize.promptOnSanitize
        false

        privacy.sanitize.sanitizeOnShutdown
        true

        security.warn_viewing_mixed
        false