I've tested the Dolphin installation on several different server setups (Ubuntu Server & a Debian server) with no issues, right out of the box. These are just test servers I use for my own purposes, and they are really nothing special. I did not have to make any php changes or install any additional packages on either to have D7 up and running in under 20 minutes on both. My production sites run on Peer1 dedicated unmanaged hosting (ServerBeach) using RedHat Enterprise. Again, I've installed see more 6.0, 6.1, and 7.0 (Rc's and Final) on it without a hitch. RMS installs and runs great on each of these as well.