David R Boldt wrote: The interprogram-*-function approach is a fix; x-selection-strict-motif-ownership is a workaround. Setting interprogram-*-function "detaches" XEmacs' kill/yank operations from the clipboard; C-w, M-w, C-y etc are then purely internal operations. You can still copy data between XEmacs and other applications using C-insert and Sh-insert (if your system has Copy and Paste keys, you can use those as well). Setting x-selection-strict-motif-ownership does what "C-h v" says: *If true and XEmacs already owns the clipboard, don't own it again in the Motif way. Owning the selection on the Motif way does a huge amount of X protocol, and it makes killing text incredibly slow when using an X terminal. However, when enabled Motif text fields don't bother to look up the new value, and you can't Copy from a buffer, Paste into a text field, then Copy something else from the buffer and paste it into the text field; it pastes the first thing again. This can be a nuisance if you want to copy from XEmacs to another X application via the clipboard. Basically, x-selection-strict-motif-ownership breaks clipboard operation to make it quicker, while interprogram-*-function separates internal cut/paste from inter-program cut/paste. -- Glynn Clements <glynn.clements(a)virgin.net&gt;