I'm fairly new to Cinema4D and I've been having a bit of an issue.
I downloaded the Cinema4D demo version (R13.017) and registered it.
When I create a spline (such as a text spline or an n-side spline) and place in under a NURB, the spline disappears from the 'Perspective' viewport and seems to appear in front of me in 2D space (see images for details). Even if I rotate the camera view, the 'object' moves along with it (as if in 2D space).
I hope I'm explaining this well. Just ask if you need clarification.