diff --git a/Cocoa/Document.m b/Cocoa/Document.m
index ffcf870..0997d49 100644
--- a/Cocoa/Document.m
+++ b/Cocoa/Document.m
@@ -157,7 +157,11 @@ static void printImage(GB_gameboy_t *gb, uint32_t *image, uint8_t height,
     self.view.mouseHidingEnabled = (self.mainWindow.styleMask & NSFullScreenWindowMask) != 0;
     [self.view flip];
     GB_set_pixels_output(&gb, self.view.pixels);
-    [self reloadVRAMData: nil];
+    if (self.vramWindow.isVisible) {
+        dispatch_async(dispatch_get_main_queue(), ^{
+            [self reloadVRAMData: nil];
+        });
+    }
 }
 
 - (void) run
@@ -734,8 +738,13 @@ static void printImage(GB_gameboy_t *gb, uint32_t *image, uint8_t height,
                                     NULL,
                                     YES,
                                     renderingIntent);
+    CGDataProviderRelease(provider);
+    CGColorSpaceRelease(colorSpaceRef);
     
-    return [[NSImage alloc] initWithCGImage:iref size:NSMakeSize(width * scale, height * scale)];
+    NSImage *ret = [[NSImage alloc] initWithCGImage:iref size:NSMakeSize(width * scale, height * scale)];
+    CGImageRelease(iref);
+    
+    return ret;
 }
 
 - (void) reloadMemoryView
diff --git a/Core/gb.c b/Core/gb.c
index 923b403..6109c93 100755
--- a/Core/gb.c
+++ b/Core/gb.c
@@ -137,7 +137,7 @@ void GB_free(GB_gameboy_t *gb)
         }
     }
     for (int i = 0x400; i--;) {
-        if (gb->reversed_symbol_map.buckets[i]) {
+        while (gb->reversed_symbol_map.buckets[i]) {
             GB_symbol_t *next = gb->reversed_symbol_map.buckets[i]->next;
             free(gb->reversed_symbol_map.buckets[i]);
             gb->reversed_symbol_map.buckets[i] = next;
diff --git a/HexFiend/HFTextVisualStyleRun.m b/HexFiend/HFTextVisualStyleRun.m
index e9675cd..39442d5 100644
--- a/HexFiend/HFTextVisualStyleRun.m
+++ b/HexFiend/HFTextVisualStyleRun.m
@@ -22,6 +22,7 @@
     [_backgroundColor release];
     [_bookmarkStarts release];
     [_bookmarkExtents release];
+    [_bookmarkEnds release];
     [super dealloc];
 }