diff --git a/broadcastradio/1.1/ITunerCallback.hal b/broadcastradio/1.1/ITunerCallback.hal
index b1c5b01..2e593b0 100644
--- a/broadcastradio/1.1/ITunerCallback.hal
+++ b/broadcastradio/1.1/ITunerCallback.hal
@@ -29,9 +29,9 @@
      * Method called by the HAL when a tuning operation completes
      * following a step(), scan() or tune() command.
      *
-     * This callback supersedes V1_0::tuneComplete. For performance reasons,
-     * the 1.0 callback may not be called when HAL implementation detects 1.1
-     * client (by casting V1_0::ITunerCallback to V1_1::ITunerCallback).
+     * This callback supersedes V1_0::tuneComplete.
+     * The 1.0 callback must not be called when HAL implementation detects
+     * 1.1 client (by casting V1_0::ITunerCallback to V1_1::ITunerCallback).
      *
      * @param result OK if tune succeeded or TIMEOUT in case of time out.
      * @param selector A ProgramSelector structure describing the tuned station.
@@ -41,9 +41,9 @@
     /**
      * Method called by the HAL when a frequency switch occurs.
      *
-     * This callback supersedes V1_0::afSwitch. For performance reasons,
-     * the 1.0 callback may not be called when HAL implementation detects 1.1
-     * client (by casting V1_0::ITunerCallback to V1_1::ITunerCallback).
+     * This callback supersedes V1_0::afSwitch.
+     * The 1.0 callback must not be called when HAL implementation detects
+     * 1.1 client (by casting V1_0::ITunerCallback to V1_1::ITunerCallback).
      *
      * @param selector A ProgramSelector structure describing the tuned station.
      */
@@ -73,6 +73,9 @@
      * call it immediately, ie. it may wait for a short time to accumulate
      * multiple list change notifications into a single event.
      *
+     * This callback is only for notifying about insertions and deletions,
+     * not about metadata changes.
+     *
      * It may be triggered either by an explicitly issued background scan,
      * or a scan issued by the device internally.
      *
@@ -89,10 +92,10 @@
      *
      * This may be called together with tuneComplete_1_1 or afSwitch_1_1.
      *
-     * This callback supersedes V1_0::tuneComplete, V1_0::afSwitch and
-     * newMetadata. For performance reasons, these callbacks may not be called
-     * when HAL implementation detects 1.1 client (by casting
-     * V1_0::ITunerCallback to V1_1::ITunerCallback).
+     * This callback supersedes V1_0::newMetadata and partly V1_0::tuneComplete
+     * and V1_0::afSwitch.
+     * 1.0 callbacks must not be called when HAL implementation detects
+     * 1.1 client (by casting V1_0::ITunerCallback to V1_1::ITunerCallback).
      */
-    oneway programInfoChanged();
+    oneway currentProgramInfoChanged();
 };