SUMMARY: Only one masters team of 36 ran clean.
Here's the course that Tika and her partner ran clean on--through sheer luck in some ways, really, since Tika often knocks bars (as we all know). But we also had the easier, first half of the course (white circles), which was basically a big circle with only a little RFP required between the dogwalk and the #5 jump to give them a good enough angle to it.
The second half (dark circles) seemed to be the killer. Several places on the course with threadles or near-threadles (4 to 5, 5 to 6, 7 to 8, 9 to 10, and 10 to 11, depending on your dog's stride length and how you handled them. I think that there were just a lot of bars on some of the turns; only 9 of the 36 Eed with off-courses, so it wasn't completely wiping people out.
Interestingly, all (or all but one) of the five Performance 3 teams ran clean.
(To download a larger image of this image, click and hold over the map--maybe right-click and hold--and you'll get a "save image as" menu choice.)