Sorry if this has already been reported or known.
this is with b18 version
Well I am getting some issue in unity when using lightmap - specular mode on iOS with emulation mode set to opengles ( as it came by default when opening unity )
In the Scene view, on that image for example in order to see really the lightmap I need to either not have
that dynamic table object in the view or disable it.
here in game view with that object enabled and disabled
When using directional lightmap mode ( non specular ) actually the baked light show up properly , but I am loosing the casted shadow of the table 
Lastely , and it may be some error on my end , but I would expect my table receiving shadow as well , but it seem that it only cast…
Switching to no no emulation mode then switching back to opengles mode also get me there
I am on Mac Book pro using Yosemite with a NVIDIA GeForce GT 650M.
all this make a bit hard to control how your stuff will look at the end … 