On a Mac, if I enter the "degree" symbol (°), LyX writes it as-is on the LaTeX output, and this produces an inputenc error.
This happened on a document which compiled fine with LyX 1.4.4. I don't know much about the encoding mess. Should the (°) be substituted with \textdegree ? -- Andrea Censi "Life is too important to be taken seriously" (Oscar Wilde) Web: http://www.dis.uniroma1.it/~censi