I am thinking I need to upgrade the front deraileur to a 10 sp since everything else in the drive train (Ultegra) is 10 speed. Shifting gets done but it is cranky when the chain is in the larger cogs (smaller gears). When the chain is on the outside cogs, it works fine. Obviously the cage is just a tad wider on the 8-speed to accomodate the wider chain. Thank you for your replies.