diff --git a/mutaext.py b/mutaext.py
index 799580e..1cb774b 100644
--- a/mutaext.py
+++ b/mutaext.py
@@ -1,8 +1,6 @@
 import mutagen
 import mutagen.id3
-import mutagen.easyid3
-
-# TODO: custom interface to tracknumber/tracktotal/disc...
+from mutagen.easyid3 import EasyID3
 
 def popms(id3):
     for k, v in id3.iteritems():
@@ -34,7 +32,7 @@ def rating_get(id3, key):
         except StopIteration:
             return []
         else:
-            return [byte2rating(popm.rating)]
+            return [unicode(byte2rating(popm.rating))]
     else:
         return list(rating.text)
 
@@ -65,20 +63,14 @@ def rating_delete(id3, key):
     if 'TXXX:RATING' in id3:
         del(id3['TXXX:RATING'])
 
-def tracknumber_get(id3, key):
-    # TODO: use for both track and disc
-    pass
-
-def tracknumber_set(id3, key, val):
-    pass
-
-def tracknumber_delete(id3, key):
-    pass
-
 replaygain_tags = ('replaygain_album_gain', 'replaygain_album_peak', \
   'replaygain_track_gain', 'replaygain_track_peak')
-
 for tag in replaygain_tags:
-    mutagen.easyid3.EasyID3.RegisterTXXXKey(tag, tag)
-mutagen.easyid3.EasyID3.RegisterTXXXKey('sync', 'SYNC')
-mutagen.easyid3.EasyID3.RegisterKey('rating', rating_get, rating_set, rating_delete)
+    EasyID3.RegisterTXXXKey(tag, tag)
+
+extra_tags = ('sync', 'totaltracks', 'totaldiscs')
+for tag in extra_tags:
+    EasyID3.RegisterTXXXKey(tag, tag.upper())
+
+EasyID3.RegisterTextKey('albumartist', 'TPE2')
+EasyID3.RegisterKey('rating', rating_get, rating_set, rating_delete)
diff --git a/unsync.py b/unsync.py
index 2cc1ffe..6acc894 100755
--- a/unsync.py
+++ b/unsync.py
@@ -9,6 +9,14 @@ import sys
 import mutagen
 import mutaext
 
+updatabletags = [\
+    'albumartist', 'composer', 'comment' \
+    'tracknumber', 'discnumber', \
+    'genre', 'date', \
+]
+updatabletags.extend(mutaext.replaygain_tags)
+updatabletags.extend(mutaext.extra_tags)
+
 def G(d, k):
     try:
         return d[k]
@@ -29,8 +37,10 @@ def filterext(paths, exts):
 def shouldsync(md):
     rating = G(md, 'rating')
     sync = G(md, 'sync')
-    if rating:
-        rating = rating[0]
+    try:
+        rating = int(rating[0])
+    except (IndexError, ValueError):
+        pass
     if sync:
         sync = sync[0].lower()
     else:
@@ -40,7 +50,7 @@ def shouldsync(md):
         return False
     if sync == u'yes' or sync == u'share':
         return True
-    if rating != None and rating >= 3:
+    if type(rating) == int and rating >= 3:
         return True
     return False
 
@@ -77,19 +87,14 @@ def findmatching(haystack, needle):
 
 def updatemetadata(mdold, mdnew):
     modified = False
-    updatabletags = ('rating', 'sync', 'comment')
-    # TODO:
-    # composer      : probably safe
-    # genre         : might need deep equal?
-    # trackNum      : TRCK with optional /[total]
-    # discNum       : TPOS "    "        "
-    # total tracks  : ?
-    # total discs   : ?
-    # [replaygain]  : TXXX:* in id3
-    # albumArtist   : TPE2 in id3
+    # TODO: ensure genre and date work properly (special cases in EasyID3)
     for tag in updatabletags:
         if tag in mdnew:
-            if not tag in mdold or mdnew[tag] != mdold[tag]:
+            if not tag in mdold:
+                #print("not in old:",tag)
+                mdold[tag] = mdnew[tag]
+            elif mdnew[tag][0] != mdold[tag][0]:
+                #print("in old:",tag)
                 mdold[tag] = mdnew[tag]
                 modified = True
         elif tag in mdold:
@@ -134,15 +139,14 @@ def run(args):
         if match:
             if updatemetadata(md, match):
                 print("UPD", p)
-                # save here
+                md.save()
         else:
-            print("DEL", p)
+            pass #print("DEL", p)
             # delete files here
 
     for md in tosync:
-        if md.seen:
-            continue
-        print("ADD", md.path)
+        if md.seen == False:
+            print("ADD", md.path)
 
     return 0