1.2.1-RC4 now available
RC3 was short lived because of a regression in the FTP proxy for those who use it to host FTP servers behind NAT. Unforeseen consequences of a bug fix in RC2 broke this.
The only change from RC3 to RC4 is this bug fix resolving problems with the FTP proxy.
1.2.1-RC4 VMware Appliance is also available.