My latest skin is blue, with several different colour substyles. Sometimes when I open the skin with SkinStudio, the blue skin loses association with the 'Go' button >

The substyles are ok.
Earlier today I changed one of the bmps which was the wrong colour, opened the skin with SkinStudio just to zip it, then uploaded. I've just opened IE to find the green default Go button there where a blue button should be and was previously. Yep, it lost the association again. I'm getting annoyed now >

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This means I have to update
again!