I was looking for some info:
http://answers.unity3d.com/questions/126487/custom-shader-turns-pink-when-built.html
http://answers.unity3d.com/questions/168624/everything-became-pink.html
I have read in one forum:
"[solution] Maybe a bit to old to reply to this post, but I had the same problem today, and fixed it by changing to another layout."
"Pink models means that the texture assigned to the model is missing. try to re-assign your texture to those model"
http://forum.unity3d.com/threads/unity3-problems-fresh-install.63284/
http://forum.unity3d.com/threads/sometimes-unity-displays-pink-colour-instead-some-things.93075/