diff --git a/src/calibre/ebooks/mobi/output.py b/src/calibre/ebooks/mobi/output.py
index 4de346c0af..5f1aa37e19 100644
--- a/src/calibre/ebooks/mobi/output.py
+++ b/src/calibre/ebooks/mobi/output.py
@@ -58,7 +58,7 @@ class MOBIOutput(OutputFormatPlugin):
             except ImportError:
                 import Image as PILImage
 
-            raw = StringIO(server_resources['calibre.png'])
+            raw = StringIO(server_resources['calibre_banner.png'])
             im = PILImage.open(raw)
             of = StringIO()
             im.save(of, 'GIF')
diff --git a/src/calibre/library/database2.py b/src/calibre/library/database2.py
index 3af4002eae..3e218e84cc 100644
--- a/src/calibre/library/database2.py
+++ b/src/calibre/library/database2.py
@@ -1374,7 +1374,7 @@ class LibraryDatabase2(LibraryDatabase):
         self.set_path(id, True)
         self.conn.commit()
         self.set_metadata(id, mi)
-        if cover:
+        if cover is not None:
             self.set_cover(id, cover)
         return id
 
diff --git a/src/calibre/library/static/calibre_banner.png b/src/calibre/library/static/calibre_banner.png
new file mode 100644
index 0000000000..1406884870
Binary files /dev/null and b/src/calibre/library/static/calibre_banner.png differ