There are two elements that may not be clear just by reading the rulebook regarding the questions posed. If the group feels the player's disc landed in casual water but it could not be found, you still treat it as if the disc was in casual water, not lost. The group makes a judgment on approximately where the disc "should be" in the casual water and player goes back up to 5m of free relief from that location to the shore.
The third item regarding broken branches came up today. One significant change from last year to this year is dealing with brush piles. Last year, it was difficult to take relief in a brush pile because you could not move any branches that projected in front of your lie, even if they were in your stance. In 2011, since the dead branches are defined as casual objects, you are now allowed to move them even if some of them project in front of your lie. But more importantly, you can take casual relief back off the brush pile with no penalty if it's not possible to move the brush (without a major effort).
Rater of the tossed arc.
Last edited by cgkdisc; Mar 14 2011 at 06:29 PM.