Blender crashes when using NURBS curve?

It seems when ever I use the NURBS curve to extrude around something Blender crashes and I have to close it down, does this happen to anyone else?

i havent about such a problem before …but you can reinstall blender into a newer version if you have older than 2.43 sorry if it didnt help (dont install blender 2.44 untill its released or you have vista