CurrentCulture in Silverlight4 and DataGrids

I having problems with DataGrid component: It shows en-US date-format (mm/dd/yyyy), but the CultureInfo.CurrentCulture is pt-BR (dd/MM/yyyy开发者_如何转开发).

Stranger is the fact that datetime is show in pt-BR when edit it: image

I can just do a IValueConverter to show it as a string (tested and worked, using CurrentCulture), but then I lost the date edition...

Any ideas? Thanks in advance ;)

See this thread for a possible solution.