Anyone who wants to look at the (large) diffs for xemacs-21.2.5 can find them at: ftp://ftp.xemacs.org/pub/xemacs/beta/testing/marzilla.diff.bz2 ftp://ftp.xemacs.org/pub/xemacs/beta/testing/marzilla.diff-w.bz2 The diff is generated using diff -u, and is designed to be machine readable. The diff-w is generated using diff -w -U8, and is designed to be human readable. Bughunters (i.e. Kyle) will want to look at bytecode.c, alloc.c and elhash.c, since those files have been largely rewritten. There's pretty much guaranteed to be a bug in there somewhere. Here's some stuff I wrote earlier that I don't think made it to this list: This is a `performance' release. The lisp engine (especially under Mule) and hash tables are significantly faster. See whether it feels faster for you. This is a `robustness' release. Circular lists are much less likely to freeze up your xemacs. Some illegal constructs in lisp or C code that used to be ignored are now tightened up, like (setq foo) which used to byte-compile. No longer. This is also a `testing' release. I'd like folks to try running make check after building XEmacs. You should see stuff like this: ------------------------------------------------------------------------ (martin＠lasker) ~/x/build/uop $ make check cd ./src && make check make[1]: Entering directory `/home/martin/x/build/uop/src' ./xemacs -batch -l /home/martin/x/dev/src/../tests/automated/test-harness.el -f batch-test-emacs /home/martin/x/dev/src/../tests/automated/hash-table-tests.el /home/martin/x/dev/src/../tests/automated/lisp-tests.el /home/martin/x/dev/src/../tests/automated/database-tests.el /home/martin/x/dev/src/../tests/automated/byte-compiler-tests.el Testing /home/martin/x/dev/tests/automated/hash-table-tests.el... hash-table-tests.el: 8554 of 8554 (100%) tests successful. Testing /home/martin/x/dev/tests/automated/lisp-tests.el... lisp-tests.el: 3188 of 3188 (100%) tests successful. Testing /home/martin/x/dev/tests/automated/database-tests.el... database-tests.el: 20 of 20 (100%) tests successful. Testing /home/martin/x/dev/tests/automated/byte-compiler-tests.el... byte-compiler-tests.el: 50 of 50 (100%) tests successful. Done make[1]: Leaving directory `/home/martin/x/build/uop/src' ------------------------------------------------------------------------ This is also an `unstable' release, simply because of the huge volume of changes. There will be bugs. Happy hunting! Keep around a copy of 21.2-b4 for a while for problem determination.