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what is a (xml parsing error:not well-formed) and how to fix this


what is a (xml parsing error:not well-formed) and how to fix this

URL of affected sites


Troubleshooting information

XML Parsing Error: not well-formed Location: http://sudburyfinecars.subarudealer.ca/WebPage.aspx?WebSiteID=205 Line Number 258, Column 152:

Additional System Details

Installed Plug-ins

  • -Office Plugin for Netscape Navigator
  • BitTorrent Plugin 1
  • Java(TM) Platform SE binary
  • Adobe PDF Plug-In For Firefox and Netscape "9.3.3"
  • Default Plug-in
  • Shockwave Flash 10.1 r53
  • Delivery Network Acceleration by BitTorrentâ„¢
  • GEPlugin
  • Windows Presentation Foundation (WPF) plug-in for Mozilla browsers
  • Google Updater pluginhttp://pack.google.com/
  • Google Update
  • Java Plug-in 1.6.0_13 for Netscape Navigator (DLL Helper)
  • Npdsplay dll
  • DRM Store Netscape Plugin
  • DRM Netscape Network Object


  • User Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv: Gecko/20100625 Firefox URIAPRO[] ( .NET CLR 3.5.30729)

More Information

DaveRo 18 solutions 175 answers

It means that the website code - as sent to the browser - contains errors.

This is often because the website has been compressed in some way by a 'proxy server. I've seen this happen on mobile phone connections. The site usually works fine on a non-mobile connection.

That site works fine here.

Question owner

I found the solution to my own problem by using Internet Explorer instead of Firefox, it turn out that the site i was trying to get into is an old site using proxy servers that Firefox doesn't read properly giving me the XML parsing error:not well-formed. Its not Firefox's fault its just letting you know that this could be a problem site if it lets you in.

Question owner

I have the same problem, with one of our federal government websites, how do I fix this in FF?!?!