The last few rides I've had some problems dropping the chain when shifting down to the small ring. The limit screw is correctly adjusted and the bike shifts fine, front and rear, under all other circumstances.
It seems to happen under load, at higher RPM and when the drivetrain may need some lube - at the end of a ride.
Other than making sure the chain is properly lubed, are there any other suggestions? The chain has 755.5 miles on it since new.