diff --git a/ext/bulk_actions/script.js b/ext/bulk_actions/script.js
index 831c00870..184a4b8cb 100644
--- a/ext/bulk_actions/script.js
+++ b/ext/bulk_actions/script.js
@@ -68,11 +68,11 @@ function get_selected_items() {
 }
 
 function set_selected_items(items) {
-    $(".shm-thumb").removeClass('selected');
+    $(".shm-thumb").removeClass('bulk_selected');
 
     $(items).each(
         function(index,item) {
-            $('.shm-thumb[data-post-id="' + item + '"]').addClass('selected');
+            $('.shm-thumb[data-post-id="' + item + '"]').addClass('bulk_selected');
         }
     );
 
diff --git a/ext/bulk_actions/style.css b/ext/bulk_actions/style.css
index 4e7449fc6..117a5ce87 100644
--- a/ext/bulk_actions/style.css
+++ b/ext/bulk_actions/style.css
@@ -1,4 +1,4 @@
-.selected {
+.bulk_selected {
 	outline: 3px solid blue;
 }
 
diff --git a/ext/cron_uploader/style.css b/ext/cron_uploader/style.css
index 2643a6a16..770152bde 100644
--- a/ext/cron_uploader/style.css
+++ b/ext/cron_uploader/style.css
@@ -1,3 +1,3 @@
-table.log th {
+table.cron_uploader_log th {
 	width: 200px;
 }
\ No newline at end of file
diff --git a/ext/cron_uploader/theme.php b/ext/cron_uploader/theme.php
index e367ba195..977f40f34 100644
--- a/ext/cron_uploader/theme.php
+++ b/ext/cron_uploader/theme.php
@@ -115,7 +115,7 @@ public function display_documentation(
         $page->add_block($block_usage);
 
         if (!empty($log_entries)) {
-            $log_html = "<table class='log'>";
+            $log_html = "<table class='cron_uploader_log'>";
             foreach ($log_entries as $entry) {
                 $log_html .= "<tr><th>{$entry["date_sent"]}</th><td>{$entry["message"]}</td></tr>";
             }
diff --git a/ext/index/style.css b/ext/index/style.css
index 5ecd5a282..8fdee55d7 100644
--- a/ext/index/style.css
+++ b/ext/index/style.css
@@ -1,5 +1,3 @@
-
-/*noinspection CssRedundantUnit*/
 #image-list .blockbody {
 	background: none;
 	border: none;
diff --git a/ext/setup/style.css b/ext/setup/style.css
index 6237cd650..c8904a5b1 100644
--- a/ext/setup/style.css
+++ b/ext/setup/style.css
@@ -17,17 +17,6 @@
 	resize: vertical;
 }
 
-.helpable {
-	border-bottom: 1px dashed gray;
-}
-
-.ok {
-	background: #AFA;
-}
-.bad {
-	background: #FAA;
-}
-
 #Setupmain .blockbody {
 	background: none;
 	border: none;
diff --git a/ext/tag_editcloud/style.css b/ext/tag_editcloud/style.css
index 0c5b9566d..995d2d56a 100644
--- a/ext/tag_editcloud/style.css
+++ b/ext/tag_editcloud/style.css
@@ -1,4 +1,4 @@
-span.tag-selected {
+.tageditcloud span.tag-selected {
 	background:#88EE88;
 }
 
diff --git a/ext/upload/style.css b/ext/upload/style.css
index d6d803849..6dd19550d 100644
--- a/ext/upload/style.css
+++ b/ext/upload/style.css
@@ -1,17 +1,8 @@
-/* Only need to change the file/url inputs */
-#large_upload_form INPUT.wid {
-	width: 100%;
-}
-#radio_button {
-	width: auto;
-}
-#wrapper {
-    opacity: 0.4;
-    filter: alpha(opacity=40); /* msie */
+#large_upload_form TD,
+#large_upload_form TH {
+	vertical-align: middle;
 }
 
-/* This is needed since the theme style.css forcibly sets vertical align to "top". */
-TABLE.vert TD, TABLE.vert TH {vertical-align: middle;}
 .mini_upload INPUT {
 	width: 100%;
 }
diff --git a/ext/upload/theme.php b/ext/upload/theme.php
index fd7ca1304..78ee4005a 100644
--- a/ext/upload/theme.php
+++ b/ext/upload/theme.php
@@ -49,7 +49,7 @@ public function display_page(Page $page): void
         $form = SHM_FORM("upload", "POST", true, "file_upload");
         $form->appendChild(
             TABLE(
-                ["id" => "large_upload_form", "class" => "vert"],
+                ["id" => "large_upload_form"],
                 TR(
                     TD(["width" => "20"], rawHTML("Common&nbsp;Tags")),
                     TD(["colspan" => "6"], INPUT(["name" => "tags", "type" => "text", "placeholder" => "tagme", "class" => "autocomplete_tags"]))
@@ -242,7 +242,7 @@ public function display_replace_page(Page $page, int $image_id)
         $form = SHM_FORM("replace/".$image_id, "POST", true);
         $form->appendChild(emptyHTML(
             TABLE(
-                ["id" => "large_upload_form", "class" => "vert"],
+                ["id" => "large_upload_form"],
                 $upload_list,
                 TR(TD("Source"), TD(["colspan" => 3], INPUT(["name" => "source", "type" => "text"]))),
                 TR(TD(["colspan" => 4], INPUT(["id" => "uploadbutton", "type" => "submit", "value" => "Post"]))),
diff --git a/themes/danbooru/style.css b/themes/danbooru/style.css
index 598c05f91..b912670b4 100644
--- a/themes/danbooru/style.css
+++ b/themes/danbooru/style.css
@@ -219,21 +219,6 @@ margin:16px;
 padding:8px;
 width:350px;
 }
-.helpable {
-border-bottom:1px dashed gray;
-}
-.ok {
--moz-background-clip:border;
--moz-background-inline-policy:continuous;
--moz-background-origin:padding;
-background:#AAFFAA none repeat scroll 0 0;
-}
-.bad {
--moz-background-clip:border;
--moz-background-inline-policy:continuous;
--moz-background-origin:padding;
-background:#FFAAAA none repeat scroll 0 0;
-}
 .comment .username {
 font-size:1.5em;
 font-weight:bold;
diff --git a/themes/danbooru2/style.css b/themes/danbooru2/style.css
index ba42886f1..70d23acd2 100644
--- a/themes/danbooru2/style.css
+++ b/themes/danbooru2/style.css
@@ -269,21 +269,6 @@ width:100%;
 margin-top:0.4rem;
 padding:0.2rem 0.6rem;
 }
-.helpable {
-border-bottom:1px dashed gray;
-}
-.ok {
-background:#AAFFAA none repeat scroll 0 0;
--moz-background-clip:border;
--moz-background-inline-policy:continuous;
--moz-background-origin:padding;
-}
-.bad {
-background:#FFAAAA none repeat scroll 0 0;
--moz-background-clip:border;
--moz-background-inline-policy:continuous;
--moz-background-origin:padding;
-}
 .comment .username {
 font-weight:bold;
 font-size:1.5em;
diff --git a/themes/lite/style.css b/themes/lite/style.css
index 7ee856451..6ebe6fd4d 100644
--- a/themes/lite/style.css
+++ b/themes/lite/style.css
@@ -316,16 +316,6 @@ ARTICLE TABLE {
 	font-size: 0.75rem;
 }
 
-.helpable {
-	border-bottom: 1px dashed gray;
-}
-
-.ok {
-	background: #AFA;
-}
-.bad {
-	background: #FAA;
-}
 
 NAV .thumbblock {
 	float: none;