The top's texture appears to overlap part of the texture space reserved for shoes. The overlapping part is not being used by the top, it's probably just an excessive solid-colour margin leftover from baking the bow and lapels. This is especially visible with shoes utilizing different placements of the shoe UVs like these ones from the Sweet Allure creator kit, but the overlap affects most shoes to some degree.
Edit By crinrict: Adjusted Title fit older report.
