I had one problem with this install, which I have not had on previous openrc xfce installs.
Upon booting the live install from a USB, the USB drive was recognized as sda, and my hardrive was recognized as sdb. I was able to get around the problem and complete the install to harddrive by specifying sdb (instead of sda) when defining the / and swap mount points as well as installing grub to sdb.
The install appeared to work, I was able to boot into the newly installed openrc xfce. However there was one additional problem I discovered when inserting a USB drive; Thunar would not automount USB drives. After some research, I discovered that /etc/fstab had defined my / and swap mounts as /dev/sdb1 and /dev/sdb2. I changed these to be sda instead and all appears to be ok now, Thunar now automounts USB drives.
This problem did not occur on another install I performed. The difference in the problematic machine is that its bios treats the USB drive as a separate drive, similar to a CD or floppy drive. The bios on the machine that did not have the problem treats the USB drive as simply another disk drive and you must choose between the 2 disk drives to boot from.
Thanks for such a wonderful distro, excellent work!