diff --git a/js/bluesky.js b/js/bluesky.js
index 4eba254..5a1ae2b 100644
--- a/js/bluesky.js
+++ b/js/bluesky.js
@@ -127,7 +127,13 @@ class BlueskyService {
             await this.auth.signIn(handle);
         } catch (error) {
             console.error('[Bluesky] Sign in failed:', error);
-            this.ui.updateLoginState(false, `Sign in failed: ${error.message || 'Please try again'}`);
+
+            // Check for invalid_client_metadata error
+            if (error.message && error.message.includes('invalid_client_metadata')) {
+                this.ui.updateLoginState(false, 'Bluesky\'s authentication service appears to be down, as it\'s returning the dreaded "invalid_client_metadata" error. Please try again in a few minutes.');
+            } else {
+                this.ui.updateLoginState(false, `Sign in failed: ${error.message || 'Please try again'}`);
+            }
         }
     }