The Jump skill has scads of silliness both in 3.0 and 3.5. 3.5 is slightly easier to work with, but not by a lot.
The core silliness I find is that someone with a bonus of +0 in Jump can take 10 and jump a 10-foot ditch, but if they don't take 10, they might jump 1 foot or 20 feet. The...