Hello, Inside a view i have a list of nations, the drop-down is "observed" and at any modification of this list an other nested list (with a regions list) will be updated, that is itself observed and that update an other nested list of provinces. When i modify the nation at the beginning the regions and provinces are correctly updated, but when the region is automatically updatet its modification will be revealed by its observer and that read a "null" value (as a string) and an error will be generated. This happened ONLY using Internet Explorer, not using Firefox or Safari.
Any idea? Thanks!
Iwan
Sorry for my poor english 
