diff --git a/platform/chromium/manifest.json b/platform/chromium/manifest.json
index 1ca4ebf73..e8b1eb112 100644
--- a/platform/chromium/manifest.json
+++ b/platform/chromium/manifest.json
@@ -2,7 +2,7 @@
     "manifest_version": 2,
 
     "name": "µBlock",
-    "version": "0.8.5.5",
+    "version": "0.8.5.6",
 
     "default_locale": "en",
     "description": "__MSG_extShortDesc__",
diff --git a/platform/firefox/vapi-background.js b/platform/firefox/vapi-background.js
index 2fe33301b..e8a8d28b2 100644
--- a/platform/firefox/vapi-background.js
+++ b/platform/firefox/vapi-background.js
@@ -45,7 +45,7 @@ vAPI.firefox = true;
 // TODO: read these data from somewhere...
 vAPI.app = {
     name: 'µBlock',
-    version: '0.8.5.5'
+    version: '0.8.5.6'
 };
 
 /******************************************************************************/
@@ -945,7 +945,7 @@ var httpObserver = {
             result = vAPI.net.onHeadersReceived.callback({
                 url: URI.asciiSpec,
                 tabId: channelData[1],
-                parentFrameId: -1,
+                parentFrameId: channelData[0] === this.MAIN_FRAME ? -1 : 0,
                 responseHeaders: result ? [{name: topic, value: result}] : []
             });
 
diff --git a/platform/safari/Update.plist b/platform/safari/Update.plist
index acd4e8560..e9a130f3d 100644
--- a/platform/safari/Update.plist
+++ b/platform/safari/Update.plist
@@ -14,7 +14,7 @@
 				<key>CFBundleVersion</key>
 				<string>{buildNumber}</string>
 				<key>URL</key>
-				<string>https://chrismatic.io/ublock/ublock-0.8.5.5.safariextz</string>
+				<string>https://chrismatic.io/ublock/ublock-0.8.5.6.safariextz</string>
 			</dict>
 		</array>
 	</dict>