The only "problems" I hade were:
1) broken seat pivot bolt - annoying, but I had sort of expected it, and I replaced it very quickly. I was going to warranty it, but I figured they would just put the same bolt back in, and I decided to replace it with a grade 8, 5/16-18, carriage bolt. It fits perfect in replacement of the M6 metric carriage bolt Kubota supplies, and you can buy it at most local hardware stores.
2) Air cleaner strap came loose, but did not break - tightened it with a 15 mm socket, no more problems but I check it every so often now, mostly just because I like to look at the engine. Again, I expected this after reading this website.
3) HST pedal - I'll be taking it in for warranty repair, and general checkup of the machine, after I finish the 50 hr service next week.
4) Torn ball joint rubber boot on steering knuckle - this one's probably my own fault. I must have dragged it over a stick or something without realizing it.
edit - 5) actually I had a couple shear pins shear, the ones that keep the pins in the front loader pivts from rotating. See my previous posts, it has some pictures if you are interested.
Still very happy with my machine though. Although I do want to get the HST pedal resolved.