Friendly Error messages

SP 2007 upgrade to 2010 - no visual updates made 

Scenario

Publishing Page checked out - When I e.g select the 'Show editing page toolbar' from the site settings menu - Instead of the toolbar opens and states the page is checked out - I get this:

I've have adjusted the Webconfig to this as this was set to 'true'

<SafeMode MaxControls="200" <em>CallStack="false"</em> DirectFileDependencies="10" TotalFileDependencies="50" AllowPageLevelTrace="false">