We perform a Full Backup weekly and a Differential Backup nightly on our Development AND QA SQL Servers. Partially as a way to mimic the Production environment, partially to allow for recovery should a particular task/job/modification/etc. is a simple issue that a restore would save time with.
Chris Powell
George: You're kidding.
Elroy: Nope.
George: Then lie to me and say you're kidding.