diff --git a/css/map.css b/css/map.css
index bea6edde3..d8f8ab220 100644
--- a/css/map.css
+++ b/css/map.css
@@ -651,7 +651,7 @@ text.pointlabel {
   dominant-baseline: middle;
 }
 
-/* Opera doesn't support dominant-baseline */
+/* Opera doesn't support dominant-baseline. See #715 */
 .opera .pathlabel .textpath {
   baseline-shift: -33%;
   dominant-baseline: auto;
diff --git a/js/id/id.js b/js/id/id.js
index df986bc5f..a7d7a44ac 100644
--- a/js/id/id.js
+++ b/js/id/id.js
@@ -127,6 +127,7 @@ iD.detect = function() {
         browser.support = true;
     }
 
+    // Added due to incomplete svg style support. See #715
     browser.opera = ua.indexOf('Opera') >= 0;
 
     browser.locale = navigator.language;