This is a huge problem.  I'm using 9.2.20092.1003.   When a grid is sorted, any postback causes the selectedrowschange event (really causes the grid to re-initialize) on any postback.   I am using a sqldatasource with parameters so the datasource itself is not re-populating but the grid does.

When the grid is not sorted, the selectedrowschange does not fire.. unless of course I change a row.