We started having severe problems with the rudder last weekend when the "Up" cable jumped the sheave in the rear seat position (see:
viewtopic.php?f=75&t=28316), got it repaired by the dealer in time for us to go on a four-day trip this weekend.
This weekend we had a completely different problem - we had total failure of the rudder to turn to starboard on Friday (7/30); it would turn to port just fine, but not starboard - even when using both hands and the tiller lever was against the stop. Winds were 12-14 knots at the time, in a protected channel with 1-2 inch chop. I cycled the rudder up and down several times, tried it with the sail furled, completely out and partially furled to no avail. I had to use our paddle to steer for approximately 4 miles out of 10 on our return trip home that day.
Yesterday (7/31), making sure nothing was interfering with the control lines below the deck by not putting anything down there, we had the same thing happen again - in winds of 0-5 knots and waves of 6 inches or less. Again, total failure to steer to starboard even in light conditions. We took videos of what was happening, but can't post them from our hotel.