3:08:07beachKrystof: Yes, coordinate swizzling was designed to make that work with mirrored sheets. The X11 window created would have a limited size, and the sheet transformation(s) would be set up to do the right thing. But we have had trouble with that code.
3:08:08beachPlus, it turns out that sheets should not be mirrored unless they represent foreign gadgets. So we (or I thought we) got rid of most mirrored sheets so that only the top sheet is mirrored.