Just playing around with curves and dimensions about 1 unit in size, with
huge spiral a few million units in size, and growing it a few more million units.
Or a few billion units in size...

The vertical dimensions vanish before the horizontal dimensions.

Hiding the huge spiral restores the small curves and small dimensions.
So the small curves and dimensions still exist, just their display seems to be impacted by the huge curve.

Tried a huge archimedian spiral also, with similar results.

Tried rebuild on small log spiral, then scale up to a few million units. Similar results.

This is in Beta5, but I think applies to version 4 as well.

- Brian