diff --git a/content/copilot/how-tos/provide-context/use-mcp/use-the-github-mcp-server.md b/content/copilot/how-tos/provide-context/use-mcp/use-the-github-mcp-server.md
index e4cff5ef3b80..5e5b1febc9d3 100644
--- a/content/copilot/how-tos/provide-context/use-mcp/use-the-github-mcp-server.md
+++ b/content/copilot/how-tos/provide-context/use-mcp/use-the-github-mcp-server.md
@@ -1,6 +1,6 @@
 ---
 title: Using the GitHub MCP Server
-intro: 'Learn how to use the GitHub Model Context Protocol (MCP) server to extend {% data variables.copilot.copilot_chat_short %}.'
+intro: 'Learn how to use the GitHub Model Context Protocol (MCP) server to interact with repositories, issues, pull requests, and other GitHub features, directly from {% data variables.copilot.copilot_chat_short %}.'
 shortTitle: Use the GitHub MCP Server
 versions:
   feature: copilot
diff --git a/src/frame/components/page-header/Header.module.scss b/src/frame/components/page-header/Header.module.scss
index 4bb8e2053b9d..27b117d45644 100644
--- a/src/frame/components/page-header/Header.module.scss
+++ b/src/frame/components/page-header/Header.module.scss
@@ -6,11 +6,6 @@
   display: unset;
 }
 
-// Need children of portal root to be higher z-index to show dropdown
-.portalRoot * {
-  z-index: 3 !important;
-}
-
 // Contains the logo and version picker and used when the smaller width search
 // input UI is closed.
 .logoWithClosedSearch {
diff --git a/src/frame/components/page-header/Header.tsx b/src/frame/components/page-header/Header.tsx
index 30bb786d26dd..ed4154567027 100644
--- a/src/frame/components/page-header/Header.tsx
+++ b/src/frame/components/page-header/Header.tsx
@@ -149,7 +149,7 @@ export const Header = () => {
       {error !== '404' && <HeaderNotifications />}
       <header
         className={cx(
-          'color-bg-default p-2 position-sticky top-0 z-1 border-bottom',
+          'color-bg-default p-2 position-sticky top-0 z-2 border-bottom',
           scroll && 'color-shadow-small',
         )}
         role="banner"
diff --git a/src/frame/components/ui/MarkdownContent/stylesheets/table.scss b/src/frame/components/ui/MarkdownContent/stylesheets/table.scss
index 17f61298df19..9654e2e259e0 100644
--- a/src/frame/components/ui/MarkdownContent/stylesheets/table.scss
+++ b/src/frame/components/ui/MarkdownContent/stylesheets/table.scss
@@ -35,6 +35,7 @@
     thead {
       position: sticky;
       top: 105px; // 88 + 8 + 8 + 1, space for the site header
+      z-index: 1; // Ensure header stays above content including superscripts
 
       @include breakpoint-xxl {
         top: 65px !important; // 48 + 8 + 8 + 1, space for the site header
diff --git a/src/frame/stylesheets/dialog-overrides.scss b/src/frame/stylesheets/dialog-overrides.scss
index 69bebb7001f7..4401dcd0e78d 100644
--- a/src/frame/stylesheets/dialog-overrides.scss
+++ b/src/frame/stylesheets/dialog-overrides.scss
@@ -10,3 +10,8 @@
     visibility: hidden !important;
   }
 }
+
+// Fix z-index for ActionMenu overlays (version picker, etc.) to appear above site header
+#__primerPortalRoot__ * {
+  z-index: 3 !important;
+}