Live is definitely a bit of a mess. I changed my password a while back and, IIRC, included a '%'. Worked fine on PC/Xbox, but then I went back to a GFWL game so

Live is definitely a bit of a mess. I changed my password a while back and, IIRC, included a '%'. Worked fine on PC/Xbox, but then I went back to a GFWL game some time later and found that it would claim my password was incorrect. Took me a while to work out -- I assumed it was just a bugged install because I could log in fine elsewhere, and a password reset didn't help -- but eventually realised that changing my password to something that didn't include that character let me log in.