Index: BitmapFontImporter/Editor/BFImporter.cs
===================================================================
--- BitmapFontImporter/Editor/BFImporter.cs	(revision 4865)
+++ BitmapFontImporter/Editor/BFImporter.cs	(working copy)
@@ -59,8 +59,9 @@

             SerializedObject so = new SerializedObject(font);
             so.Update();
-            so.FindProperty("m_FontSize").floatValue = parse.fontSize;
+            so.FindProperty("m_FontSize").floatValue = Mathf.Abs(parse.fontSize);
             so.FindProperty("m_LineSpacing").floatValue = parse.lineHeight;
+            so.FindProperty("m_Descent").floatValue = -parse.lineHeight;
             UpdateKernings(so, parse.kernings);
             so.ApplyModifiedProperties();
             so.SetIsDifferentCacheDirty();