diff --git a/src/core/meta-clipboard-manager.c b/src/core/meta-clipboard-manager.c
index b85d87fd0d300b192c76d98d54218e051741d368..794195f41a8ea5aeb915185359669326ae1edf56 100644
--- a/src/core/meta-clipboard-manager.c
+++ b/src/core/meta-clipboard-manager.c
@@ -152,6 +152,7 @@ owner_changed_cb (MetaSelection       *selection,
                                                     display->saved_clipboard);
       g_set_object (&display->selection_source, new_owner);
       meta_selection_set_owner (selection, selection_type, new_owner);
+      g_object_unref (new_owner);
     }
 }
 
@@ -170,6 +171,7 @@ meta_clipboard_manager_shutdown (MetaDisplay *display)
 {
   MetaSelection *selection;
 
+  g_clear_object (&display->selection_source);
   g_clear_pointer (&display->saved_clipboard, g_bytes_unref);
   g_clear_pointer (&display->saved_clipboard_mimetype, g_free);
   selection = meta_display_get_selection (display);
diff --git a/src/wayland/meta-wayland-data-device.c b/src/wayland/meta-wayland-data-device.c
index daf2968532205be8f389049478a6efc2f9cee359..9231ac594270a8ac734d1f2e5a9b04eec65a1039 100644
--- a/src/wayland/meta-wayland-data-device.c
+++ b/src/wayland/meta-wayland-data-device.c
@@ -94,7 +94,7 @@ static struct wl_resource *
 create_and_send_dnd_offer (MetaWaylandDataSource *source,
                            struct wl_resource *target)
 {
-  MetaWaylandDataOffer *offer = g_slice_new0 (MetaWaylandDataOffer);
+  MetaWaylandDataOffer *offer;
   struct wl_array *mime_types;
   struct wl_resource *resource;
   char **p;
diff --git a/src/wayland/meta-wayland-data-offer-primary-legacy.c b/src/wayland/meta-wayland-data-offer-primary-legacy.c
index ae55a9edcc9b7a7efa89c899d325f8e61895857c..5fe9523d3f59906cafb812fe511dbeccaae3511a 100644
--- a/src/wayland/meta-wayland-data-offer-primary-legacy.c
+++ b/src/wayland/meta-wayland-data-offer-primary-legacy.c
@@ -51,6 +51,7 @@ transfer_cb (MetaSelection *selection,
     }
 
   g_output_stream_close (stream, NULL, NULL);
+  g_object_unref (stream);
 }
 
 static void
diff --git a/src/wayland/meta-wayland-data-offer-primary.c b/src/wayland/meta-wayland-data-offer-primary.c
index 98b7b09107ab4975fb245f5904a44540bbe5e170..a2a4dfe80b236a09f2647048c8e621b5d0dc7a7e 100644
--- a/src/wayland/meta-wayland-data-offer-primary.c
+++ b/src/wayland/meta-wayland-data-offer-primary.c
@@ -51,6 +51,7 @@ transfer_cb (MetaSelection *selection,
     }
 
   g_output_stream_close (stream, NULL, NULL);
+  g_object_unref (stream);
 }
 
 static void
diff --git a/src/wayland/meta-wayland-data-offer.c b/src/wayland/meta-wayland-data-offer.c
index 800d55144aa3ec853409dd086dd073de540b003a..fa14fae1aedc15fff4911a235583549ec2236b99 100644
--- a/src/wayland/meta-wayland-data-offer.c
+++ b/src/wayland/meta-wayland-data-offer.c
@@ -77,6 +77,7 @@ transfer_cb (MetaSelection *selection,
     }
 
   g_output_stream_close (stream, NULL, NULL);
+  g_object_unref (stream);
 }
 
 static void
diff --git a/src/wayland/meta-xwayland-dnd.c b/src/wayland/meta-xwayland-dnd.c
index 5e9d8f8b3416677d87324bb97b772b4b593f7467..cd0f0d3eaa582b44315487404b9cb9aea497c5ae 100644
--- a/src/wayland/meta-xwayland-dnd.c
+++ b/src/wayland/meta-xwayland-dnd.c
@@ -367,6 +367,7 @@ transfer_cb (MetaSelection *selection,
     }
 
   g_output_stream_close (stream, NULL, NULL);
+  g_object_unref (stream);
 }
 
 static void