ORIGINAL: britbrat
1) pilot inexperience
2) incorrectly configured nose-wheel linkage
3) pilot inexperience
4) incorrect right thrust
5) pilot inexperience
6) cross wind sensitivity, due to substantial dihedral
7) pilot inexperience
8) toe-out or looseness in the main gear
9) pilot inexperience
10) sticking main wheels
11) pilot inexperience
12) uneven runway surfaces
13) pilot inexperience
BINGO
Buy the way Bruce's link to the Fults gear while it won,t help the original posters problem is in fact excellent nosewheel assemblys. They are fantastic on any airplane that is likely to take a beating. I have used them on two four engine airplanes and love them.
John