mac app build error fine in editor

Hi anyone seen this in Unity 4, it worked fine in 3.5

The file ‘…path to file/Contents/Data/level0’ is corrupted! Remove it and launch unity again!
[Position out of bounds! 47553 > 47552]

***** FIXED *****

I had 2 files one a .js and one a .cs named the same “file.js” and “file.cs”. I removed the js file and it works fine