Hi PaQ - by the way this bug is purely a display glitch, your actual curve is not changing to be straight line, just the visual display of it.

For example if you go to do an "on" object snap to that curve, or like draw a line across it and get an "int" snap, those points will be on the actual proper curve.

- Michael

Hi Michael,

Yes I notice it too, as the 4 control points are still there too :)
It's not a big problem anyway...

I would like to fix it, but it is not really a quick and easy area to fix up since it is a very performance sensitive area. I have to be very careful about changes to this particular thing so that all curve displaying doesn't get slowed down too much with extra tolerance checking.

That's why it has to go on the back burner for at least a bit.

- Michael