had the same issue when trying to add a 3750G to an existing 3750X (both on 15.0(2)SE11)3750G had the ipservices image, 3750X had the universal image with ipservices licence, but showing Feature Mismatch "show platform stack compatibility configurati...
downgrading from c880data-universalk9-mz.152-1.T.binto c880data-universalk9-mz.151-4.M1.binseams to have make the adsl connection much more stable for us. thanks
