http://forum.troikatronix.com/cgi-bin/forum/gforum.cgi?post=10598;t=search_engine#10598
1) THESE VERSIONS ARE NOT GUARANTEED TO BE BUG FREE! Don't use them for mission critical situations, i.e., for the show you're going to open tomorrow.
2) If you do choose to try out these versions, make a backup of your files so you can revert to a previous version should you need to do so.
Enjoy the pre-release and remember to report any bugs you find (nicely) to Mark Coniglio via the bug page: he is letting you use it early, in return for your generous attitude in return.
http://troikatronix.com/izzy-bugreport.html
ta
jamie