Hello, just as I thought I'd cracked it!!!
I have WP Twenty Ten and have created a Child Theme. All has been fine with set-up and modification until today...
I added 2 new pages (using my version of one column template) as child pages to my T-Shirt page.
I have Pretty Permalinks set up so my new pages were set as http://www.myurl/T-shirt/London-Designs and ditto/Windsor-Designs
Unfortunately T-shirts is now my home page!
I niticed something odd in the Permalinks Settings... where I typed a custom URL to specify the Pretty Permalink e.g. http://www.mydomain.com/contact it has changed to /http:/www.mydomain.com/contact - is this correct behaviour?
I have deactivated and reactivated my plugins as I read somewhere that this is a common culprit apart from that I am stuck!