Thank you all for making us aware of the odometer bug when upgrading to iOS 4.2.1. We have fixed the problem and submitted an update for Apple's review. This new release was submitted on Tuesday, November 23rd, and we anticipate it being available via the App Store by the end of next week.
WORK-AROUND: In the meantime, you can safely use the Number Pad option for data entry in lieu of the odometer picker. Select the Presets Tab at the bottom, choose Settings, and select Number Pad for the data entry.
Our apologies for the inconvenience.
FYI, this release also includes the option of HTML or CSV reports. And the reports will be email attachments so greater amounts of data can be exported in the report.