I think this happened when they added absolute aim for sticks.
They made a song and dance about devoting dev time to input, then made a complete mess of it (Plus made things even worse for analog input users) and not a word has been heard since.
It's only about 10% though, so as long as your steering axis is properly centered and not suffering from excessive play or jitter, then it is usable.
You might want to try either DIView to get a really accurate calibration (
http://www.leobodnar...page=page&id=12) or my UJR app (see sig) to allow you to tweak your axis (eg set the "Sensitivity" value higher (to over 100%) to make the stick report higher values closer to the center.