Has anyone experienced the front ring that hold the hood fall/seperate from the barrell? This happened to me today and I am really bummed! I expected more from and $1.2K lens... It started off binding while rotating my focal ring and it eventually separated.. ARHHHHH....... How much would it cost to be repaired? I hear this is a common problem... or is it not? There are 3 retaining pins exposed, but seem too low to keep the ring on.... should I just "super glue" it back? Any input would be greatly appreciated.... Thanks Photo buffs..