To improve performance, the GUI has been gradually moved from image-based borders to CSS3 borders. This reduces the number of loaded images and reduces the complexity of the layout.

All image-based borders which used the ox:border tag have now been removed. The images which are no longer needed are the background images referenced by the cpheader-*, cpbody-* and cpbottom-* CSS classes. The classes themselves, with the exception of the *-color classes, are not used anymore either.

This is a backwards-compatible change. Theme authors may want to remove unused elements from their themes.

This change makes Software Change Request 574 obsolete.