SL Baur writes: If I understand the problem, it would be solved by having separate package tarballs that use the old file extension. 21.2 can search for .elx then .elc then .el. Make the search list configurable so you can turn off .elx or .elc loading if desired. We'll likely need to extend searching like this anyway to integrate searching for .o, files assuming the DLL support goes anywhere. I think it is a good idea for XEmacs and Emacs installations to not intefere with each other. Since we're the spinoff, it seems reasonable and fair for us to be the ones to do the changing.