(I have scanned the web for anyone else mentioning this and found nothing)
- The Gray helix Lightsaber from the Gree event is crooked coming off of the hilt. It is not straight. It is several degrees off. I never noticed it until I used it on my Guardian who holds his saber upwards at all times. It is quite maddening to stare at a crooked saber for hours at a time. If you have OCD tendencies avoid getting this saber for a guardian. You won't notice it on other saber wielders. There is a picture of it on Dulfy's guide to the Gree event:
http://dulfy.net/2013/02/12/swtor-relics-of-the-gree-event-guide/
- Another more well known bug is that the saber loses it's special effect and reverts to a generic saber appearance after casting certain abilities, turning in quests, and completing certain tasks with your saber drawn. This can be fixed by pressing 'Z' to sheathe your weapon then pressing 'Z' again to unsheathe your weapon.
- FUN FACT: The Gray Helix Lightsaber is one of the longest, if not the longest, lightsabers in-game. It is a good in-game foot longer than almost any other saber you'll find. Its one of the reasons I still use it despite the bugs.
Hope this helps some make a decision on what Gree event weapon to purchace. Good luck and may the force be with you.