I have saved three cplanes, all of which fail to see any change happen when selecting them, either via the save cplane box or in the cplane drop down list. I seem to recal hopping in and out of them the other day. and seeing changes happen on screen.
I am in the default view at the mo, but unable to go to a saved cplane.
I have relaunched Rhino but no joy.
Furthermore creating a new planar sheet on my object sitting at 2 oclock on my circular item, then using cplane three point on it sees nothing happen in ortho views, only in perspective view do I see the grid aligned, yet in the past ortho views would change. setting top to top, etc doesnt make any difference, also world top sees no change.