Ok, I too have found this "skin is outdated" thing after installing things. Could the first post of this thread be updated to explain this? (If this has been something that's required thousands of users to ask the same question thousands of times, and have it answered thousands of times, just update the 1st post and/or release a minor update. You'll save hours and hours of time having to deal with these repetitive questions and make the newer users a hell of a lot happier and less frustrated.)
my particular problem is the one where I'm running 1.0.0.0 and the skin's version is 1.0.0.0.
Interestingly enough, the mediaportal log file shows that the version of MP is 1.0.0.22449 (or 1.0.0.24422 or something like that). Perhaps there's some patchy updatey thing I installed that updated the version and now it's throwing the skin version checking off. I tried changing resources.xml to be the same number, but it didn't help.