Laurent,
I downloaded your Mix10.MvvmDemo2 and had trouble with the ViewModelLocator. I had to move the DataContext from the UserControl to the Grid in order for this to work at design-time. See below image.
Are you seeing this also?
I have the very latest SL Tools, 30319.352, 9/2/2010. http://www.microsoft.com/downloads/details.aspx?FamilyID=b3deb194-ca86-4fb6-a716-b67c2604a139&displaylang=en
Did Cider break something?
Cheers,
Karl
