Index: id3tags.c
===================================================================
--- id3tags.c	(revision 29365)
+++ id3tags.c	(working copy)
@@ -1043,7 +1043,7 @@
                  * only be displayed up to their first null termination. All
                  * content after this null termination is obsolete and can be
                  * overwritten. */
-                bufferpos -= (bytesread - strlen(tag));
+                bufferpos = tag + strlen(tag) + 1 - buffer;
 
                 /* Seek to the next frame */
                 if(framelen < totframelen)