The launch window is now March 19th to 22nd (California time). During extended ground testing in late February, one of our second stage thrust vector control boards indicated a problem. Although our analysis showed substantial margin for flight, we decided nonetheless to increase the robustness of certain of the components and run a delta qualification.
The upgraded boards will be installed this week. If all goes well, Falcon 1 will do a static fire next week and then launch in the week of the 19th.