Alexey Mahotkin <alexm(a)hsys.msk.ru> writes:
 Hm.  Is there anywhere explained which versions of XEmacsen should
 be supported by packages? 
Currently the earliest XEmacs you need to worry about is 21.1.  It
goes without saying that releases *later* than that are supported.
When 21.4.x becomes stable and widely used, I expect the 21.1 support
to be relaxed.