Clear the cache and other data like site preferences: CTRL + SHIFT + DELETE then expand the details section check all the boxes and then hit clear.

AS A LAST RESORT Try Re-Installing firefox or make sure you have the latest version.

Good Luck

Yes have tried that from other post. It had no effect. Am trying to upload screenshot in png but it fails

Sorry forgot to emphasise that this only happens on that one site, nowhere else. Is it using a new html xhtml version that Firefox cannot cope with? Firefox trouble shooting info data file as below:

 Application Basics

       Name
       Firefox

       Version
       3.6.10

       Profile Directory

         Open Containing Folder

       Installed Plugins

         about:plugins

       Build Configuration

         about:buildconfig

 Extensions

       Name

            Version    
Enabled     

ID

   Adblo ck Plus
   1.2.2             true
  {d10d0bf8-f5b5-c8b4-a8b2-2b9879e08c5d}
British English Dictionary

1.19

   true
   en-GB@dictionaries.addons.mozilla.org

Echofon

       1.9.6.4
            true
       twitternotifier@naan.net

FireDownload

       2.0.1
       true
       firedownload@mozilla.org

Met Office weather gadget

 1.5
 true

{1BCA7BD8-8977-11DC-A9BD-548555D89593}

NewsFox
       1.0.5
       true
       {899DF1F8-2F43-4394-8315-37F6744E6319}

NoScript

       2.0.3.5
       true
       {73a6fe31-595d-460b-a920-fcc0f8843232}

RapidShare DownloadHelper

1.0
true
  rsDownloadHelper@yevgenyandrov.net

Ubuntu Firefox Modifications

       0.9rc2
       true
       ubufox@ubuntu.com

Flash and Video Download

       0.1
       true
       {bee6eb20-01e0-ebd1-da83-080329fb9a3a}

Nectar Search Toolbar

 1.300.306
      true
       {841468a1-d7f4-4bd3-84e6-bb0f13a06c64}

 Modified Preferences

     Name

                                      Value

       accessibility.blockautorefresh
       true

       accessibility.browsewithcaret
       true

       accessibility.typeaheadfind.flashBar
       0

       browser.history_expire_days.mirror
       180

       browser.history_expire_days_min
       2

       browser.places.importBookmarksHTML
       false

       browser.places.smartBookmarksVersion
       2

       browser.startup.homepage
       about:blank

       browser.startup.homepage_override.mstone
       rv:1.9.2.10

       browser.tabs.loadInBackground
       false

       dom.max_script_run_time
       20

       extensions.lastAppVersion
       3.6.10

       keyword.URL

       http://uk.search.yahoo.com/search?ourmark=1&ei=utf-8&fr=chr-nectarslv8-&type=61465&p=

       keyword.enabled
       true

       network.cookie.prefsMigrated
       true

       network.dns.disableIPv6
       true

       places.last_vacuum
       1285182163

       privacy.cpd.offlineApps
       false

       privacy.cpd.passwords
       false

       privacy.cpd.siteSettings
       true

       privacy.popups.showBrowserMessage
       false

       privacy.sanitize.migrateFx3Prefs
      true

       privacy.sanitize.timeSpan
       0

      security.warn_viewing_mixed
  false

• "Clear the Cache": Tools > Options > Advanced > Network > Offline Storage (Cache): "Clear Now"
• "Remove the Cookies" from sites that cause problems: Tools > Options > Privacy > Cookies: "Show Cookies"

Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of your add-ons is causing your problem (switch to the DEFAULT theme: Tools > Add-ons > Themes).

See Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems and Troubleshoot issues with plugins like Flash or Java to fix common Firefox problems

Ok, I dont run any "Themes" just the default. Removing cookies (again) made no difference. However starting in safe mode and disabling all addons let the page display ok!!! Whoopee!!! HOWEVER in my terminal I got many repetitions of: (<unknown>:2179): Gdk-WARNING **: XID collision, trouble ahead and then finally at the botttom: NOTE: child process received `Goodbye', closing down So I will now have to go back and try disabling the addons one by one. As I mentioned it;'s just on this one website, all others are perfectly ok. cheers Will report back later

Ok found it it's Adblock Plus 1.2.2 preventing itv.com from displaying properly.I will now go through the list of blocked ads and sort it. Many thanks guys.

You're welcome.