OE 1.0-rc3

I applied the latest BOA HEAD upgrade and included the Open Enterprise (OE 1.0-rc3) platform. When I create a site and log in as admin, then try to install an App within OE, I run into problems. OE asks for the ftp user/password then looks like it's doing the install. Once done I get "access denied", and the App has not been installed. The ftp user/pw works fine with CoreFTP, so the permissions seem correct. Any suggests?

Thanks