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tho he/she telling the authors name
This is fine. However, if the original author wishes for it to be removed it will be.
After al in my themes if I use a wallpaper I did not create. That is what I do: give credit to the person who made it. If they want it removed I will remove it.
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uploading themes in the wrong Gallery
This is not. I have suggested m9 implements a system for checking this in the upcoming new release. It is not hard to do for Sony Ericsson themes and I hope it gets included

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