--- src/models/phasemodel.dy.old	2012-03-05 14:02:42.034004014 +0100
+++ src/models/phasemodel.dy	2012-03-05 14:02:57.064985852 +0100
@@ -72,7 +72,7 @@ ProteinIntronList * read_ProteinIntronLi
     if( line[0] == '#' ) {
       continue;
     }
-    if( !isnumber(line[0]) ) {
+    if( !isdigit(line[0]) ) {
       warn("Bad looking line in intron file, %s",line);
       continue;
     }