We do have a URL rewriting system in place and the html page is actually virtually served from the Joomla CMS. Maybe the gclid doesn't kill real physical html pages?
Anyways I just wanted to let you know that the Adwords interface had not picked up any problems. Landing page speed is good, etc. The link to the ad from within the interface does not have the gclid appended to it and so it worked without error. Maybe Google could consider appending a dummy gclid to the landing page URL from within the Adwords interface so that advertisers can see what is really happening? I've wasted company money on this error.
Cheers
Do your pages break if there is anything after the "page.html"? ex. page.html?test=1
You can remove the gclid (I think!) if you disable the auto-tagging for Google Analytics.