diff --git a/osx/xcodeconfig/gtk3.xcconfig b/osx/xcodeconfig/gtk3.xcconfig
index c87ad6c425..29d2c27235 100644
--- a/osx/xcodeconfig/gtk3.xcconfig
+++ b/osx/xcodeconfig/gtk3.xcconfig
@@ -12,5 +12,3 @@
 GTK3_CFLAGS = -I/usr/local/Cellar/libffi/3.3/include -I/usr/local/Cellar/gtk+3/3.24.21/include/gtk-3.0 -I/usr/local/Cellar/glib/2.64.4/include/gio-unix-2.0 -I/usr/local/Cellar/cairo/1.16.0_3/include/cairo -I/usr/local/Cellar/libepoxy/1.5.4_1/include -I/usr/local/Cellar/pango/1.44.7/include/pango-1.0 -I/usr/local/Cellar/fribidi/1.0.10/include/fribidi -I/usr/local/Cellar/harfbuzz/2.6.8/include/harfbuzz -I/usr/local/Cellar/graphite2/1.3.14/include -I/usr/local/Cellar/atk/2.36.0/include/atk-1.0 -I/usr/local/Cellar/cairo/1.16.0_3/include/cairo -I/usr/local/Cellar/pixman/0.40.0/include/pixman-1 -I/usr/local/Cellar/fontconfig/2.13.1/include -I/usr/local/opt/freetype/include/freetype2 -I/usr/local/Cellar/libpng/1.6.37/include/libpng16 -I/usr/local/Cellar/gdk-pixbuf/2.40.0_1/include/gdk-pixbuf-2.0 -I/usr/local/Cellar/glib/2.64.4/include -I/usr/local/Cellar/glib/2.64.4/include/glib-2.0 -I/usr/local/Cellar/glib/2.64.4/lib/glib-2.0/include -I/usr/local/opt/gettext/include -I/usr/local/Cellar/pcre/8.44/include
 
 GTK3_LDFLAGS = -L/usr/local/Cellar/gtk+3/3.24.21/lib -L/usr/local/Cellar/pango/1.44.7/lib -L/usr/local/Cellar/harfbuzz/2.6.8/lib -L/usr/local/Cellar/atk/2.36.0/lib -L/usr/local/Cellar/cairo/1.16.0_3/lib -L/usr/local/Cellar/gdk-pixbuf/2.40.0_1/lib -L/usr/local/Cellar/glib/2.64.4/lib -L/usr/local/opt/gettext/lib -lgtk-3 -lgdk-3 -Wl,-framework,Cocoa -Wl,-framework,Carbon -Wl,-framework,CoreGraphics -lpangocairo-1.0 -lpango-1.0 -lharfbuzz -latk-1.0 -lcairo-gobject -lcairo -lgdk_pixbuf-2.0 -lgio-2.0 -lgobject-2.0 -lglib-2.0 -lintl
-
-#include "jansson.xcconfig"
diff --git a/plugins/aac/aac.c b/plugins/aac/aac.c
index fe9116fee0..fd0d8e11a7 100644
--- a/plugins/aac/aac.c
+++ b/plugins/aac/aac.c
@@ -1022,6 +1022,7 @@ aac_insert (ddb_playlist_t *plt, DB_playItem_t *after, const char *fname) {
             return after;
         }
         else if (res > 0) { // mp4 but not aac
+            deadbeef->fclose (fp);
             return NULL;
         }
     }
diff --git a/plugins/alac/alac_plugin.c b/plugins/alac/alac_plugin.c
index a4e72251bd..567b84226d 100644
--- a/plugins/alac/alac_plugin.c
+++ b/plugins/alac/alac_plugin.c
@@ -111,8 +111,7 @@ alacplug_init (DB_fileinfo_t *_info, DB_playItem_t *it) {
     int bps = 0;
     float duration = 0;
 
-    DB_FILE *file = deadbeef->fopen (deadbeef->pl_find_meta (it, ":URI"));
-    info->mp4reader.ptrhandle = file;
+    info->mp4reader.ptrhandle = info->file;
     mp4_init_ddb_file_callbacks (&info->mp4reader);
     info->mp4file = mp4p_open(&info->mp4reader);
 
diff --git a/plugins/cocoaui/CoverManager.h b/plugins/cocoaui/CoverManager.h
index 8d61732680..b44f60a01a 100644
--- a/plugins/cocoaui/CoverManager.h
+++ b/plugins/cocoaui/CoverManager.h
@@ -28,7 +28,7 @@
 
 + (CoverManager *)defaultCoverManager;
 - (CoverManager *)init;
-- (NSImage *)defaultCover;
+@property (nonatomic,readonly) NSImage *defaultCover;
 - (NSImage *)getCoverForTrack:(DB_playItem_t *)track withCallbackWhenReady:(void (*) (NSImage *img, void *user_data))callback withUserDataForCallback:(void *)user_data;
 
 @end
diff --git a/plugins/cocoaui/CoverManager.m b/plugins/cocoaui/CoverManager.m
index 0deb984081..c7f181aef5 100644
--- a/plugins/cocoaui/CoverManager.m
+++ b/plugins/cocoaui/CoverManager.m
@@ -31,15 +31,24 @@
 
 #define CACHE_SIZE 20
 
-@implementation CoverManager {
-    ddb_artwork_plugin_t *_artwork_plugin;
-    NSImage *_defaultCover;
+@interface CoverManager() {
     NSMutableDictionary *_cachedCovers[CACHE_SIZE];
-    char *_name_tf;
 }
 
+@property (nonatomic) ddb_artwork_plugin_t *artwork_plugin;
+@property (nonatomic,readwrite) NSImage *defaultCover;
+@property (nonatomic) char *name_tf;
+
+@end
+
+@implementation CoverManager
+
 - (void)dealloc {
     deadbeef->tf_free (_name_tf);
+    _name_tf = NULL;
+    for (int i = 0; i < CACHE_SIZE; i++) {
+        _cachedCovers[i] = nil;
+    }
 }
 
 + (CoverManager *)defaultCoverManager {
@@ -61,10 +70,6 @@ - (CoverManager *)init {
     return self;
 }
 
-- (NSImage *)defaultCover {
-    return _defaultCover;
-}
-
 - (NSString *)hashForTrack:(DB_playItem_t *)track  {
     ddb_tf_context_t ctx = {
         ._size = sizeof (ddb_tf_context_t),
@@ -73,7 +78,7 @@ - (NSString *)hashForTrack:(DB_playItem_t *)track  {
     };
 
     char buffer[PATH_MAX];
-    deadbeef->tf_eval (&ctx, _name_tf, buffer, sizeof (buffer));
+    deadbeef->tf_eval (&ctx, self.name_tf, buffer, sizeof (buffer));
     return [NSString stringWithUTF8String:buffer];
 }
 
@@ -143,12 +148,30 @@ - (void)addCoverForTrack:(ddb_playItem_t *)track withImage:(NSImage *)img {
     }
 
 //    NSLog (@"+ %@", hash);
-    NSMutableDictionary *d = [[NSMutableDictionary alloc] initWithObjectsAndKeys:hash, @"hash", t, @"ts", img, @"img", nil];
+    NSMutableDictionary *d = [[NSMutableDictionary alloc] initWithObjectsAndKeys:hash, @"hash", t, @"ts", nil];
+    if (img != nil) {
+        d[@"img"] = img;
+    }
     _cachedCovers[i_min] = d;
 }
 
+- (void)dumpCache {
+    for (int i = 0; i < CACHE_SIZE; i++) {
+        NSLog(@"%@", _cachedCovers[i]);
+    }
+}
+
+- (NSDictionary *)findInCache:(NSString *)key {
+    for (int i = 0; i < CACHE_SIZE; i++) {
+        if ([_cachedCovers[i][@"hash"] isEqualToString:key]) {
+            return _cachedCovers[i];
+        }
+    }
+    return nil;
+}
+
 - (NSImage *)getCoverForTrack:(DB_playItem_t *)track withCallbackWhenReady:(void (*) (NSImage *img, void *user_data))callback withUserDataForCallback:(void *)user_data {
-    if (!_artwork_plugin) {
+    if (!self.artwork_plugin) {
         callback (nil, user_data);
         return nil;
     }
@@ -165,7 +188,6 @@ - (NSImage *)getCoverForTrack:(DB_playItem_t *)track withCallbackWhenReady:(void
         }
     }
 
-//    NSLog (@"! %@", hash);
     ddb_cover_query_t *query = calloc (sizeof (ddb_cover_query_t), 1);
     query->_size = sizeof (ddb_cover_query_t);
     query->track = track;
@@ -176,7 +198,8 @@ - (NSImage *)getCoverForTrack:(DB_playItem_t *)track withCallbackWhenReady:(void
     info->real_user_data = user_data;
     query->user_data = info;
 
-    _artwork_plugin->cover_get (query, cover_loaded_callback);
+    [self addCoverForTrack:query->track withImage:nil];
+    self.artwork_plugin->cover_get (query, cover_loaded_callback);
 
     return nil;
 }
diff --git a/plugins/dumb/dumb-kode54/src/it/reads3m.c b/plugins/dumb/dumb-kode54/src/it/reads3m.c
index 4957f9cfc9..3970b0d92d 100644
--- a/plugins/dumb/dumb-kode54/src/it/reads3m.c
+++ b/plugins/dumb/dumb-kode54/src/it/reads3m.c
@@ -149,7 +149,7 @@ static int it_s3m_read_sample_data(IT_SAMPLE *sample, int ffi, unsigned char pac
 	long datasize = sample->length;
 	if (sample->flags & IT_SAMPLE_STEREO) datasize <<= 1;
 
-	sample->data = malloc(datasize * (sample->flags & IT_SAMPLE_16BIT ? 2 : 1));
+	sample->data = calloc(datasize * (sample->flags & IT_SAMPLE_16BIT ? 2 : 1), 1);
 	if (!sample->data)
 		return -1;
 
@@ -177,7 +177,7 @@ static int it_s3m_read_sample_data(IT_SAMPLE *sample, int ffi, unsigned char pac
 			((signed char *)sample->data)[n] = dumbfile_getc(f);
 
 	if (dumbfile_error(f))
-		return -1;
+		return 0;
 
 	if (ffi != 1) {
 		/* Convert to signed. */
@@ -233,7 +233,7 @@ static int it_s3m_read_pattern(IT_PATTERN *pattern, DUMBFILE *f, unsigned char *
 
 	length = dumbfile_igetw(f);
 	
-	if (dumbfile_error(f) || !length)
+	if (dumbfile_error(f))
 		return -1;
 
 	pattern->n_rows = 0;
diff --git a/plugins/gtkui/fileman.c b/plugins/gtkui/fileman.c
index 00d334ee36..1b8b765411 100644
--- a/plugins/gtkui/fileman.c
+++ b/plugins/gtkui/fileman.c
@@ -315,28 +315,24 @@ set_file_filter (GtkFileChooser *dlg, const char *name) {
     if (!name) {
         name = _("Supported sound formats");
     }
-    static char extlist[10000];
 
-    // Build extension list
-    if (extlist[0] == '\0') {
+    GtkFileFilter* flt;
+
+    flt = gtk_file_filter_new ();
+    gtk_file_filter_set_name (flt, name);
+
+    // Add supported extensions
         DB_decoder_t **codecs = deadbeef->plug_get_decoder_list ();
         for (int i = 0; codecs[i]; i++) {
             if (codecs[i]->exts && codecs[i]->insert) {
                 const char **exts = codecs[i]->exts;
+                char buf[100];
                 for (int e = 0; exts[e]; e++) {
-                    char buf[100];
-                    snprintf (buf, sizeof (buf), "*.%s;", exts[e]);
-                    strcat (extlist, buf);
+                    snprintf (buf, sizeof (buf), "*.%s", exts[e]);
+                    gtk_file_filter_add_pattern (flt, buf);
                 }
             }
         }
-    }
-
-    GtkFileFilter* flt;
-
-    flt = gtk_file_filter_new ();
-    gtk_file_filter_set_name (flt, name);
-    gtk_file_filter_add_pattern (flt, extlist);
     gtk_file_chooser_add_filter (GTK_FILE_CHOOSER (dlg), flt);
     gtk_file_chooser_set_filter (GTK_FILE_CHOOSER (dlg), flt);