The Name attribute value 'label1' cannot be set on the element 'Label'

I have a custom control which extends ContentControl and until I upgraded to the June Beta everything worked without a problem (I had the Feb CTP installed previously).

After the upgrade, I now get the following error. I have removed all 'Name' and 'x:Name' properties I can find without resolving the issue. So firstly what is the problem and secondly how can I find the offending 'Name'

The Name attribute value 'label1' cannot be set on the element 'Label'
because it is under the scope of the element 'Form1' that already has names registered
under it when it was defined in another scope.

Thanks for the help

Kendrew

[683 byte] By [Kendrew] at [2007-12-24]