Scrollbar scrolls unexpectedly when column width is changed. Check the following video for a reference: http://screencast.com/t/Y6IwtREc
Workaround: Using fixed sized columns prevents the issue.
This particular issue is reproducible only in the rare scenario when setting a single edited property raises PropertyChanged event for multiple other properties. Only AutoSized columns are affected Fixing it would interefere with some of the core concepts behind column widths recalculation. If you similar behavior in a scenario that is not described here, please open a support ticket.