ps I've tried tapping it out from the drive side after liberal application of penetrating fluid all over but no joy...I think I may have a similar problem - I can get the drive-side bolt out no problems, but the non-drive is stuck: trying to loosen it with an allen key both ends just loosens off the drive side. I can't really see a way out of this one except maybe drilling it out which will cause more problems than it solves! Help, anyone?