the first thing is that i get this error message that says
no handler for this version1 what does it mean
and for some weird reason i can't see my regular items

any solutions or ideas

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by the way every custome stuff i download i put it in the style/theme folder is that the problem

Try re-installing the game, thats all I can think of. And make sure that your disc doesn't have any scratches because that can affect it.

Really, I never get ANY of these problems, so I personally don't know.