You should change your focus away from the oUF elements. They are already working fine for so to say all units. What you want to focus on is the core. The change I made that I believe would resolve this issue was
6e72dac8. If it didn't then the problem might lie elsewhere.
I'll probably have a chance to actually do some in-game testing of this later today. You can also embed oUF without it clashing with other layouts by using a custom X-oUF variable in the TOC.