The static fire took place on Saturday [20 Sep 2008, CA time], as expected, and no major issues came up. However, after a detailed analysis of data, we decided to replace a component in the 2nd stage engine LOX supply line. There is a good chance we would be ok flying as is, but we are being extremely cautious.

This adds a few extra days to the schedule, so the updated launch window estimate is now Sept 28th through Oct 1st [CA time].

—Elon—