I forgot to mention, that the error occurs not only when i change the icons but also the border and the look of the buttons (dont know the correct names at the tabs, in german it's 'Symbole','Fensterrahmen','Fensterinhalt', sry).
I forgot to mention, that the error occurs not only when i change the icons but also the border and the look of the buttons (dont know the correct names at the tabs, in german it's 'Symbole' ,'Fensterrahmen ','Fensterinhal t', sry).