This question is locked. New answers and comments are not allowed.
When I use the Extended Selection Mode on a grid with a row detail template and try to select rows by draging the mouse, the selection does not work correctly. As soon as I move the mouse out of the first selection row, it selects a group of 4 or 5 rows instead of just the next one. I get this behaviour on both the Q3 2009 and Q1 2010 releases. I also tried it with the demo samples and it does it to.