Lightmapping problem

After hours of leaving my scene to bake lightmaps in Unity 5.0.1p3, this is the unfortunate result I get in the editor… The main issues being the artifacts on the track, and the strange texturing on the walls on the stadium…

This is what it should look like…

Am I doing something wrong or is this a bug?

Looks like it’s fluffed up on symmetrical pieces…those outside bends, are they the same at all corners, or is there one that comes out ok? Do you use scaling to get symmetry (i.e. -1)?

Not sure what I did, but I no longer have this issue. Thanks for the help anyway.