Hi,
I downloaded latest blender from buildbot. It works fine for me.
If you have a specific issue with a blend file the send me it and write the steps to reproduce the bug.
Flipped normals are fine. I don’t know how to get right normal for a face.
In curve surfaces:
Press Shift+A - create curve surface
Press Ctrl+LeftClick - Create some points
Press A - create new Curve