A top Microsoft engineer has thrown out a weekend challenge to the Windows Vista team: Find and fix a bug in the current code and earn $100. The employee who installs the latest Vista build at home and squashes the most bugs before Monday will get an extra $500.Brian Valentine issued the challenge Friday in an e-mail to members of the team working on Vista, the next update of the company's Windows operating system. The move comes as Microsoft is wrapping up work on a broad test version of Vista, expected by many Windows watchers to be released later this month. Microsoft has said it is on track to deliver a test version to roughly two million users this quarter. Microsoft is pushing to wrap up development of Vista this year, with a mainstream launch slated for January. The company had long hoped to release it this holiday season, but in March announced that the launch would be delayed.
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