This is now fixed for the next beta (offset of a circle not on one of the world axis planes).

In the next beta (which shouldn't be much longer, tomorrow or the next day) if you do an offset of a planar curve, it will offset within its own plane instead of only trying to offset relative to the plane of the view you are picking in like it does in the current beta.

Also another tune up for curve offsets is that in the new beta offset will automatically join together segments that are touching each other, you don't have to explicitly join them first. This makes it easier to work with surface edges. For example in the next beta you can pick the 4 edges of a box and then offset them and it will do an offset of the joined rectangle so the lines will trim or extend with each other. In the current beta in cases like this each line would offset individually and as such would not trim or extend, you would have to manually join first. Which is another annoyance with edges because you can't join edges with other edges to make a new curve, but I have also fixed this for the next beta as well.

- Michael