diff --git a/classes/feeds.php b/classes/feeds.php
index de2f750cd..b4b20d2fc 100755
--- a/classes/feeds.php
+++ b/classes/feeds.php
@@ -706,6 +706,7 @@ class Feeds extends Handler_Protected {
 			<?= javascript_tag("js/common.js") ?>
 			<?= javascript_tag("lib/dojo/dojo.js") ?>
 			<?= javascript_tag("lib/dojo/tt-rss-layer.js") ?>
+			<?= Config::get_override_links() ?>
 		</head>
 		<body class="flat ttrss_utility feed_debugger css_loading">
 		<script type="text/javascript">
diff --git a/classes/handler/public.php b/classes/handler/public.php
index c6ec39f36..f89be14bb 100755
--- a/classes/handler/public.php
+++ b/classes/handler/public.php
@@ -451,6 +451,7 @@ class Handler_Public extends Handler {
 				echo javascript_tag("lib/dojo/dojo.js");
 				echo javascript_tag("lib/dojo/tt-rss-layer.js");
 			?>
+			<?= Config::get_override_links() ?>
 		</head>
 		<body class='flat ttrss_utility'>
 		<div class='container'>
diff --git a/classes/rssutils.php b/classes/rssutils.php
index 561171d09..385ab31e6 100755
--- a/classes/rssutils.php
+++ b/classes/rssutils.php
@@ -316,14 +316,20 @@ class RSSUtils {
 
 				$feed_data = trim($feed_data);
 
-				$rss = new FeedParser($feed_data);
-				$rss->init();
+				if ($feed_data) {
+					$rss = new FeedParser($feed_data);
+					$rss->init();
 
-				if (!$rss->error()) {
-					$basic_info = [
-						'title' => mb_substr(clean($rss->get_title()), 0, 199),
-						'site_url' => mb_substr(UrlHelper::rewrite_relative($feed->feed_url, clean($rss->get_link())), 0, 245),
-					];
+					if (!$rss->error()) {
+						$basic_info = [
+							'title' => mb_substr(clean($rss->get_title()), 0, 199),
+							'site_url' => mb_substr(UrlHelper::rewrite_relative($feed->feed_url, clean($rss->get_link())), 0, 245),
+						];
+					} else {
+						Debug::log(sprintf("unable to parse feed for basic info: %s", $rss->error()), Debug::LOG_VERBOSE);
+					}
+				} else {
+					Debug::log(sprintf("unable to fetch feed for basic info: %s [%s]", UrlHelper::$fetch_last_error, UrlHelper::$fetch_last_error_code), Debug::LOG_VERBOSE);
 				}
 			}
 
@@ -597,10 +603,13 @@ class RSSUtils {
 			Debug::log("site_url: {$feed_obj->site_url}", Debug::LOG_VERBOSE);
 			Debug::log("feed_title: {$rss->get_title()}", Debug::LOG_VERBOSE);
 
-			Debug::log("favicon: needs check: {$feed_obj->favicon_needs_check} is custom: {$feed_obj->favicon_is_custom} avg color: {$feed_obj->favicon_avg_color}",
+			Debug::log('favicon: needs check: ' . ($feed_obj->favicon_needs_check ? 'true' : 'false')
+				. ', is custom: ' . ($feed_obj->favicon_is_custom ? 'true' : 'false')
+				. ", avg color: {$feed_obj->favicon_avg_color}",
 				Debug::LOG_VERBOSE);
 
-			if ($feed_obj->favicon_needs_check || $force_refetch) {
+			if ($feed_obj->favicon_needs_check || $force_refetch
+				|| ($feed_obj->favicon_is_custom && !$feed_obj->favicon_avg_color)) {
 
 				// restrict update attempts to once per 12h
 				$feed_obj->favicon_last_checked = Db::NOW();
@@ -631,13 +640,16 @@ class RSSUtils {
 					$feed_obj->favicon_avg_color = 'fail';
 					$feed_obj->save();
 
-					$feed_obj->favicon_avg_color = \Colors\calculate_avg_color($favicon_cache->get_full_path($feed));
-					$feed_obj->save();
+					$calculated_avg_color = \Colors\calculate_avg_color($favicon_cache->get_full_path($feed));
+					if ($calculated_avg_color) {
+						$feed_obj->favicon_avg_color = $calculated_avg_color;
+						$feed_obj->save();
+					}
 
-					Debug::log("favicon: avg color: {$feed_obj->favicon_avg_color}", Debug::LOG_VERBOSE);
+					Debug::log("favicon: calculated avg color: {$calculated_avg_color}, setting avg color: {$feed_obj->favicon_avg_color}", Debug::LOG_VERBOSE);
 
 				} else if ($feed_obj->favicon_avg_color == 'fail') {
-					Debug::log("floicon failed on $feed, not trying to recalculate avg color", Debug::LOG_VERBOSE);
+					Debug::log("floicon failed on $feed or a suitable avg color couldn't be determined, not trying to recalculate avg color", Debug::LOG_VERBOSE);
 				}
 			}
 
diff --git a/include/colors.php b/include/colors.php
index 5682b55a1..64e24f8f1 100644
--- a/include/colors.php
+++ b/include/colors.php
@@ -355,8 +355,9 @@ function colorPalette(string $imageFile, int $numColors, int $granularity = 5):
 			} else {
 				$img = @$ico->images[count($ico->images)-1]->getImageResource();
 			}
+		} else {
+			return null;
 		}
-		return null;
 	} else if ($size[0] > 0 && $size[1] > 0) {
 		$img = @imagecreatefromstring(file_get_contents($imageFile));
 	}
diff --git a/plugins/auth_internal/init.php b/plugins/auth_internal/init.php
index 135e4d3ed..f113cd31e 100644
--- a/plugins/auth_internal/init.php
+++ b/plugins/auth_internal/init.php
@@ -76,6 +76,7 @@ class Auth_Internal extends Auth_Base {
 										},
 									};
 								</script>
+								<?= Config::get_override_links() ?>
 							</head>
 							<body class="flat ttrss_utility otp css_loading">
 								<h1><?= __("Authentication") ?></h1>
diff --git a/plugins/bookmarklets/init.php b/plugins/bookmarklets/init.php
index 4a7a35608..f5b3ab1ca 100644
--- a/plugins/bookmarklets/init.php
+++ b/plugins/bookmarklets/init.php
@@ -56,6 +56,7 @@ class Bookmarklets extends Plugin {
 						display : none;
 					}
 				</style>
+				<?= Config::get_override_links() ?>
 			</head>
 			<body class='flat ttrss_utility css_loading'>
 			<script type="text/javascript">
@@ -202,6 +203,7 @@ class Bookmarklets extends Plugin {
 					display : none;
 				}
 			</style>
+			<?= Config::get_override_links() ?>
 		</head>
 		<body class='flat ttrss_utility share_popup css_loading'>
 			<script type="text/javascript">
diff --git a/plugins/share/init.php b/plugins/share/init.php
index 62869bfb1..8e25dc677 100644
--- a/plugins/share/init.php
+++ b/plugins/share/init.php
@@ -195,6 +195,7 @@ class Share extends Plugin {
 							)
 						), 500, "...")) ?>">
 					<meta property='og:image' content="<?= htmlspecialchars($og_image) ?>">
+					<?= Config::get_override_links() ?>
 				</head>
 
 				<body class='flat ttrss_utility ttrss_zoom css_loading'>
