I was on the Liberty GB (v0.4?) that utilized the .591 leak and I never really had any issues. If you read all of p3droid's tweets and forum posts the rooted version of .596 (mentioned in the post above) is identical to the OTA (same build number, .596). The only difference is that p3droid's version is pre-rooted. He also said that installing the pre-rooted version will NOT prevent future OTA updates. So to answer you question, I do not think there is anything different between the two builds, except that one is rooted.