I am unsure whether it is just me or if it's the server or a general bug. But on Tekkit servers whenever I press "C" whilst holding my Swiftwolf's Rending Gale it crashes my game.
I really hope that this isn't just me because that would really suck.
Also if this happens to you please post below with relevant information.
EDIT: Sorry if this doesn't follow the proper format, I am just a bit desperate to know if it is just me.
I use the 1.1 version of Tekkit BTW.