MKCL 1.1.0 RC3, is now available for general use.
ASDF has been upgraded to 2.23.6. Note that initial default value of asdf:*central-registry* is now NIL, which is significantly different from the previous version (2.011). You may have to adjust your environment accordingly.
The Quicklisp port preview previously mentioned on mkcl-devel is also expected to be fully functional, please report if it is not.
On Win64, the prebuild installation package had to back away from gcc 4.7.1 down to gcc 4.5.4 following a report of bad code optimization in gcc 4.7.X and gcc 4.6.X on x86_64 for some version of Intel Core2 CPUs. There is no loss of functionality in MKCL because of this.
Cheers,
Jean-Claude Beaudoin