Hrvoje Niksic <hniksic(a)srce.hr&gt; writes: But on the other hand the sentence is correct. It says: If you compile in OffiX (prequisite) you may run into problems using multiple displays. That it is. If you open another frame on a different display, the Atom number difference (sorry, no explosion ;-) makes XEmacs core dump, cause it may understand a simple WM_PROTOCOL (enter for example) message, as a Drop and will access unspecified memory cause it uses the wrong part of the XEvent union. It is only buggy if you open frames on multiple displays from the same instance of XEmacs. [I never encountered this problem...] XEmacs 20.3+ had the same problems, and we also included OffiX... Regards, Oliver.