Posted version 1.1.1 with the following update:
1.1.1 April 12, 2011 When updating book date/timestamp and timezone values, use the most recent updated book as the reference point rather than the computer date/time and timezone. This addresses issues that occur when there are discrepancies between the device and computer with regard to these values. One significant situation where this can occur is when a non-North American user has a PRS-950, which only allows North Americna timezones to be set.