The [first release candidate binary and source distributions for abcl-1.0.1 have been uploaded][1] for which the differences are currently best summarized in the [CHANGES document][2].
[1]: http://common-lisp.net/project/armedbear/releases/1.0.1/RC1/
[2]: http://trac.common-lisp.net/armedbear/browser/branches/1.0.x/abcl/CHANGES
If anyone has any bug contributions they intend to close in the next day, please speak up now. There are still half-a-dozen [bug reports attached to the milestone][3] which were reported on the mailing list in the couple of weeks after the abcl-1.0.0 release which would have been nice to fix.
[3]: http://trac.common-lisp.net/armedbear/query?status=assigned&status=new&a...
There is still substantial work for me do on the various bits in the abcl-public_html directory (we apparently didn't publish a set of release notes for abcl-1.0.0 which I have to recreate). And I need to double-check and update the release process document as well, so the actual release is probably at least a day away.
Testing of the downloadable sources would be appreciated, especially under MSFT Windows.