I've got latest CSBuild and CSBwin exes. When I paint the new skin with CSBuild misc->skin map it works only on level 0. If I try to paint on any other level, nothing shows up when I run in CSBwin. If I change any level's default skin from level info dialog, I see my custom skin covering the whole level.
So, the skin works, but why doesn't the painting to only select squares work on any level other than 0?
