Stairs and handrails have displayed properly up till now. Apparently I've changed something and wasn't warned about it and now new stairs show no handrails above the cut plane and existing stairs are no longer drawn with dashed lines above the cut line.
AutoCAD LT 2013
Revit Architecture LT 2013
The first thing I would check is the visibility graphics of the view (either VV or VG).
Look under railings and see if any of the <Above> items have been turned off or unchecked.
Also look under the Stairs to see if the like Projection/Surface lines have been overridden.
If it is project wide then I wood look on the manage tab>Settings>Object Styles.
Or on second thought - your project is phased.... the phasing may be causing the issue.. if you look under your phases anything that is existing is solid.. that would also override the dashed lines of the stair...