Reduced warning on ascender+descender > EM box to DEBUG level, as this case is compensated for by additional code in guessVerticalMetricsFromGlyphBBox() and is therefore only confusing. I tested problematic fonts and they show an acceptable line layout. No semantics changed.
xmlgraphics/fop/trunk/src/java/org/apache/fop/fonts/truetype/TTFFile.java