EDIT: I just found a couple of small bugs and a relatively large one. There will be a patch released hopefully by tomorrow. Your save file should be just fine and completely compatible, unless you last saved between obtaining the quest to find the Faerie Keystone and actually finding the keystone. In which case, you don't have to complete the quest! (But I recommend that you do anyway, it's helpful) :)
Sorry for the inconvenience folks!