Is bsurfaces included in our addons repository? There was another report the other day, and the problem was that addons using Grease Pencil data will now need to be looking for it in both the active object and the scene - the active object (for old files) and scene for all new files.

Yes, related to GP.
This is the error:
"There aren't any strokes."

A quick fix while the new GP is still in WiP state.

This is s post from el_diablo on BA (the original Bsurfaces v1.5 thread from Eclectiel):

So GP strokes are under scene by default from 2.73 (or recent buildbots). The fast fix is to manually assign the GPencil to the object instead. Since Algorith intends to provide UI for making the object assignment I don't see a need for changing the Bsurfaces code.

For anyone in trouble because Bsurfaces and/or loop tools don't work right now:

• draw your strokes while in edit mode
• open up python console
• copy/paste: C.active_object.grease_pencil = bpy.data.grease_pencil["GPencil"]
• if you changed GPencil default datablock name, replace in above line as well
• Run Add Surface