diff --git a/src-tauri/src/player/mod.rs b/src-tauri/src/player/mod.rs
index cbca0101..7bac5371 100644
--- a/src-tauri/src/player/mod.rs
+++ b/src-tauri/src/player/mod.rs
@@ -519,7 +519,12 @@ impl PlayerController {
     /// Used on platforms where video is rendered outside the native backend
     /// (Linux WebKitGTK HTML5 <video>): the queue/UI state must reflect the
     /// item, but MPV must not start a redundant decode for it.
-    #[cfg(target_os = "linux")]
+    ///
+    /// Not gated to Linux. Its caller stopped being a `#[cfg]` branch and became
+    /// a runtime question — "does this renderer draw the picture?" — so the
+    /// `else` arm is compiled on every platform even where it never runs. The
+    /// gate outliving its caller broke the Android build outright, which went
+    /// unnoticed because nothing built for Android afterwards.
     pub fn set_current_item(&self, item: MediaItem) -> Result<(), PlayerError> {
         debug!(
             "[PlayerController] set_current_item (no backend load): {}",
diff --git a/src-tauri/src/player/video_surface.rs b/src-tauri/src/player/video_surface.rs
index 60595fc2..7162e37b 100644
--- a/src-tauri/src/player/video_surface.rs
+++ b/src-tauri/src/player/video_surface.rs
@@ -377,7 +377,19 @@ fn draw(widget: &gtk::Box, cr: &gtk::cairo::Context, state: &Rc<RefCell<SurfaceS
     if !s.logged_first_frame || s.logged_size != (width, height) {
         s.logged_first_frame = true;
         s.logged_size = (width, height);
-        info!("[VideoSurface] rendering {width}x{height} (texture {texture})");
+        // The allocation *origin* matters as much as its size. A GtkBox is a
+        // no-window widget, so `widget.window()` is the parent's GdkWindow and
+        // the box sits at an offset inside it. `draw_from_gl` composites into
+        // that window; if it does not honour the cairo translation GTK applied
+        // for this widget, the picture lands at the window origin instead of
+        // the widget's — misaligned by exactly this offset, which is the shape
+        // of a letterbox that does not line up.
+        let alloc = widget.allocation();
+        info!(
+            "[VideoSurface] rendering {width}x{height} at widget origin ({}, {}) scale {scale} (texture {texture})",
+            alloc.x(),
+            alloc.y()
+        );
     }
 
     unsafe {