diff -uNr MPlayer-r27054.orig/libmpdemux/demux_audio.c MPlayer-r27054/libmpdemux/demux_audio.c
--- MPlayer-r27054.orig/libmpdemux/demux_audio.c	2008-05-21 19:07:37.000000000 +0300
+++ MPlayer-r27054/libmpdemux/demux_audio.c	2008-06-23 15:04:54.000000000 +0300
@@ -329,7 +329,7 @@
     sh_audio->i_bps = sh_audio->wf->nAvgBytesPerSec;
     free(mp3_found);
     mp3_found = NULL;
-    if(s->end_pos) {
+    if(s->end_pos && (s->flags & STREAM_SEEK)) {
       char tag[4];
       stream_seek(s,s->end_pos-128);
       stream_read(s,tag,3);