diff --git a/examples/MusPlay-Qt/SingleApplication/singleapplication.cpp b/examples/MusPlay-Qt/SingleApplication/singleapplication.cpp
index 1be086af..8154242e 100644
--- a/examples/MusPlay-Qt/SingleApplication/singleapplication.cpp
+++ b/examples/MusPlay-Qt/SingleApplication/singleapplication.cpp
@@ -35,19 +35,22 @@ SingleApplication::SingleApplication(QStringList &args) :
     _shouldContinue = false; // By default this is not the main process
 
     socket = new QUdpSocket();
-    server = NULL;
+    server = nullptr;
     QString isServerRuns;
 
     bool isRunning=false;
     m_sema.acquire();//Avoid races
-    if(m_shmem.attach()) //Detect shared memory copy
-    {
-        isRunning = true;
-    }
-    else
+
+    if(!m_shmem.create(1))//Detect shared memory copy
     {
-        m_shmem.create(1);
-        isRunning = false;
+        m_shmem.attach();
+        m_shmem.detach();
+        if(!m_shmem.create(1))
+        {
+            isRunning = true;
+            if(!m_shmem.attach())
+                qWarning() << "Can't re-attach existing shared memory!";
+        }
     }
 
     //Force run second copy of application
diff --git a/src/codecs/music_gme.c b/src/codecs/music_gme.c
index 0c387e24..9906a35c 100644
--- a/src/codecs/music_gme.c
+++ b/src/codecs/music_gme.c
@@ -138,6 +138,8 @@ GME_Music *GME_LoadSongRW(SDL_RWops *src, int trackNum)
 
         /* Set infinite playback */
         gme_set_fade(music->game_emu, -1);
+        /* For old versions, for newer the next call is supported: */
+        /* gme_set_autoload_playback_limit(music->game_emu, 0); */
 
         music->volume = MIX_MAX_VOLUME;
         music->tempo = 1.0;
diff --git a/src/music.c b/src/music.c
index b7dc74a5..0ce96bf3 100644
--- a/src/music.c
+++ b/src/music.c
@@ -665,8 +665,8 @@ static Mix_MusicType xmi_compatible_midi_player()
 #ifdef MUSIC_MID_ADLMIDI
 static int detect_imf(SDL_RWops *in, Sint64 start)
 {
-    Uint16 chunksize, buff, i = 42;
-    Uint32 sum1 = 0,  sum2 = 0;
+    Uint16 chunksize, buff;
+    Uint32 sum1 = 0,  sum2 = 0, passed_length = 0;
     Uint16 word;
 
     if(!in)
@@ -684,22 +684,27 @@ static int detect_imf(SDL_RWops *in, Sint64 start)
         return 0;
     }
 
-    while (i > 0) {
+    while (passed_length < chunksize) {
         if (SDL_RWread(in, &word, 1, 2) != 2) {
             SDL_RWseek(in, start, RW_SEEK_SET);
             break;
         }
+        passed_length += 2;
         buff = SDL_SwapLE16(word);
         sum1 += buff;
         if (SDL_RWread(in, &word, 1, 2) != 2) {
             SDL_RWseek(in, start, RW_SEEK_SET);
             break;
         }
+        passed_length += 2;
         buff = SDL_SwapLE16(word);
         sum2 += buff;
-        i--;
     }
     SDL_RWseek(in, start, RW_SEEK_SET);
+
+    if (passed_length != chunksize)
+        return 0;
+
     return (sum1 > sum2);
 }