Index: mupdf/mupdf/pdf_font.c
===================================================================
--- mupdf/mupdf/pdf_font.c	(revision 1245)
+++ mupdf/mupdf/pdf_font.c	(working copy)
@@ -435,6 +435,29 @@
 			if (ebuffer[i][0])
 				estrings[i] = ebuffer[i];
 		}
+
+		/* Load encoding Differences nonetheless, when they're available */
+		if (fz_isdict(encoding))
+		{
+			fz_obj *diff, *item;
+
+			diff = fz_dictgets(encoding, "Differences");
+			if (fz_isarray(diff))
+			{
+				n = fz_arraylen(diff);
+				k = 0;
+				for (i = 0; i < n; i++)
+				{
+					item = fz_arrayget(diff, i);
+					if (fz_isint(item))
+						k = fz_toint(item);
+					if (fz_isname(item))
+						estrings[k++] = fz_toname(item);
+					if (k < 0) k = 0;
+					if (k > 255) k = 255;
+				}
+			}
+		}
 	}

 	error = pdf_newidentitycmap(&fontdesc->encoding, 0, 1);