I know you posted this a bit ago...but I thought I'd throw this out there. I spent awhile installing liberty 1.5 and couldn't get swiftkey to work as well. I realize this is a /facepalm solution, and someone pointed it out to me because they were awesome; I actually had to open swiftkey from the app drawer and go through the reinstallation process that way, and only then would it work. I just thought I'd let you know in case you haven't tried this...it was such an obvious solution for me and I was mad at myself for not thinking of it. You probably already have, but just in case, thought I'd suggest it.