diff --git a/apps/artcraft-launcher/src/main.rs b/apps/artcraft-launcher/src/main.rs
index cb7e87d..6d43354 100644
--- a/apps/artcraft-launcher/src/main.rs
+++ b/apps/artcraft-launcher/src/main.rs
@@ -30,7 +30,7 @@ const SETTINGS_KEY: &str = "settings";
 type Wake = Arc<OnceLock<Box<dyn Fn() + Send + Sync>>>;
 
 fn main() -> ExitCode {
-    env_logger::Builder::from_env(env_logger::Env::default().default_filter_or("warn")).init();
+    env_logger::Builder::from_env(env_logger::Env::default().default_filter_or("info")).init();
     // Detect system language in the background so the first frame can use it.
     artcraft_launcher_ui_egui::i18n::detect_system_lang_in_background();
     let args: Vec<String> = std::env::args().skip(1).collect();
diff --git a/crates/core/src/platform.rs b/crates/core/src/platform.rs
index c8b2fac..b044d29 100644
--- a/crates/core/src/platform.rs
+++ b/crates/core/src/platform.rs
@@ -300,4 +300,53 @@ mod tests {
             Some("photocraft-0.5.0-linux-riscv64.deb")
         );
     }
+
+    #[test]
+    fn strictly_matches_architecture_for_all_linux_package_formats() {
+        let multi_arch_release = release(&[
+            "photocraft-0.5.0-linux-aarch64.AppImage",
+            "photocraft-0.5.0-linux-x86_64.AppImage",
+            "photocraft-0.5.0-linux-aarch64.deb",
+            "photocraft-0.5.0-linux-x86_64.deb",
+            "photocraft-0.5.0-linux-aarch64.rpm",
+            "photocraft-0.5.0-linux-x86_64.rpm",
+            "photocraft-0.5.0-linux-aarch64.flatpak",
+            "photocraft-0.5.0-linux-x86_64.flatpak",
+            "photocraft-0.5.0-linux-aarch64.tar.gz",
+            "photocraft-0.5.0-linux-x86_64.tar.gz",
+        ]);
+
+        let p_x64 = Platform { os: Os::Linux, arch: Arch::X64 };
+        let p_arm64 = Platform { os: Os::Linux, arch: Arch::Arm64 };
+
+        for kind in [PackageKind::AppImage, PackageKind::Deb, PackageKind::Rpm, PackageKind::Flatpak, PackageKind::TarGz] {
+            let pick_x64 = pick_asset(&multi_arch_release, &["photocraft"], p_x64, &[kind]).map(|(a, _)| a.name.clone());
+            assert!(
+                pick_x64.as_deref().unwrap().contains("linux-x86_64"),
+                "Expected x86_64 asset for {kind:?}, got {pick_x64:?}"
+            );
+
+            let pick_arm64 = pick_asset(&multi_arch_release, &["photocraft"], p_arm64, &[kind]).map(|(a, _)| a.name.clone());
+            assert!(
+                pick_arm64.as_deref().unwrap().contains("linux-aarch64"),
+                "Expected aarch64 asset for {kind:?}, got {pick_arm64:?}"
+            );
+        }
+
+        // On x86_64 Linux, an aarch64-only asset must NEVER match or fall back
+        let arm_only_release = release(&[
+            "photocraft-0.5.0-linux-aarch64.AppImage",
+            "photocraft-0.5.0-linux-aarch64.deb",
+            "photocraft-0.5.0-linux-aarch64.rpm",
+            "photocraft-0.5.0-linux-aarch64.flatpak",
+            "photocraft-0.5.0-linux-aarch64.tar.gz",
+        ]);
+        for kind in [PackageKind::AppImage, PackageKind::Deb, PackageKind::Rpm, PackageKind::Flatpak, PackageKind::TarGz] {
+            assert_eq!(
+                pick_asset(&arm_only_release, &["photocraft"], p_x64, &[kind]),
+                None,
+                "x86_64 must never match an aarch64 asset for {kind:?}"
+            );
+        }
+    }
 }
diff --git a/crates/native/src/backend.rs b/crates/native/src/backend.rs
index 6e81873..725d2e3 100644
--- a/crates/native/src/backend.rs
+++ b/crates/native/src/backend.rs
@@ -309,6 +309,7 @@ impl NativeBackend {
 
     fn start_job(&self, app_id: &str, uninstall: bool) {
         let Some(app) = CraftApp::by_id(app_id) else { return };
+        log::info!("{}: starting {} job", app.name, if uninstall { "uninstall" } else { "install/update" });
         let stop = Arc::new(Stop::default());
         let restarting = {
             let mut jobs = self.shared.jobs.lock().unwrap_or_else(PoisonError::into_inner);
diff --git a/crates/native/src/detect.rs b/crates/native/src/detect.rs
index 88631f2..73c39a0 100644
--- a/crates/native/src/detect.rs
+++ b/crates/native/src/detect.rs
@@ -235,11 +235,12 @@ pub mod linux {
         if let Some(list) = capture("pacman", &["-Q"], t) {
             add(InstallSource::Pacman, packages::parse_pacman(&list));
         }
-        if let Some(list) = crate::process::capture_flatpak(&["list", "--app", "--columns=application,version"], t) {
+        let arch = format!("--arch={}", std::env::consts::ARCH);
+        if let Some(list) = crate::process::capture_flatpak(&["list", "--app", &arch, "--columns=application,version"], t) {
             let mut flatpaks = packages::parse_flatpak_list(&list);
             // Bundles built from a release tarball often list no version: ask Flatpak directly.
             for (id, version) in flatpaks.iter_mut().filter(|(id, v)| v.is_empty() && id.starts_with("ai.storyteller.")) {
-                if let Some(v) = crate::process::capture_flatpak(&["info", id], t).as_deref().and_then(packages::parse_flatpak_info) {
+                if let Some(v) = crate::process::capture_flatpak(&["info", &arch, id], t).as_deref().and_then(packages::parse_flatpak_info) {
                     *version = v;
                 }
             }
diff --git a/crates/native/src/install.rs b/crates/native/src/install.rs
index 7398ff8..d31d8b2 100644
--- a/crates/native/src/install.rs
+++ b/crates/native/src/install.rs
@@ -53,7 +53,9 @@ pub fn install(
     {
         return Err(format!("{} is running. Quit it, then try again.", app.name));
     }
+    log::info!("{}: starting {} to {} ({})", app.name, if existing.is_some() { "update" } else { "install" }, release.version_label(), kind.label());
     let (file, verified) = download(release, asset, job)?;
+    log::info!("{}: download ready ({}), running installer...", app.name, file.display());
     // Past this point the install can't be interrupted halfway.
     (job.phase)(JobPhase::Installing);
     #[allow(unused_variables)]
@@ -74,6 +76,11 @@ pub fn install(
         PackageKind::TarGz => freebsd::install_tree(app, &file, job.paths).map(|(bin, files, root)| Some(record(&version, kind, bin, files, root))),
         other => Err(format!("{} isn't supported on this system", other.label())),
     };
+    match &result {
+        Ok(_) => log::info!("{}: successfully installed/updated to {}", app.name, release.version_label()),
+        Err(e) if e == CANCELLED => log::info!("{}: installation cancelled", app.name),
+        Err(e) => log::error!("{}: installation failed: {e}", app.name),
+    }
     if !keep_download(result.is_ok(), verified) {
         let _ = std::fs::remove_file(&file);
     }
@@ -489,16 +496,33 @@ pub(crate) mod linux {
         }
         match kind {
             PackageKind::Flatpak => {
-                let status = process::flatpak_command()
-                    .args(["install", "--user", "-y", "--noninteractive", "--bundle"])
-                    .arg(f)
-                    .status()
-                    .map_err(|e| format!("couldn't start Flatpak ({e})"))?;
-                if status.success() {
-                    Ok(())
-                } else {
-                    Err("Flatpak couldn't install the bundle (it needs the Flathub remote for its runtime)".into())
-                }
+                let install_one = || {
+                    log::info!("executing flatpak install --reinstall --bundle for {}", file.display());
+                    let output = process::flatpak_command()
+                        .args(["install", "--user", "-y", "--noninteractive", "--reinstall", "--bundle"])
+                        .arg(f)
+                        .output()
+                        .map_err(|e| format!("couldn't start Flatpak ({e})"))?;
+                    if output.status.success() {
+                        log::info!("flatpak install succeeded for {}", file.display());
+                        Ok(())
+                    } else {
+                        let stderr = String::from_utf8_lossy(&output.stderr);
+                        let err = stderr.trim();
+                        let err = if err.is_empty() {
+                            String::from_utf8_lossy(&output.stdout).trim().to_string()
+                        } else {
+                            err.to_string()
+                        };
+                        if err.is_empty() {
+                            Err("Flatpak couldn't install the bundle (it needs the Flathub remote for its runtime)".into())
+                        } else {
+                            let clean_err = err.strip_prefix("error: ").or_else(|| err.strip_prefix("Error: ")).unwrap_or(&err);
+                            Err(format!("Flatpak couldn't install the bundle: {clean_err}"))
+                        }
+                    }
+                };
+                root.queue.alone(&cancelled(stop), &mut turn(phase, JobPhase::Installing), install_one).unwrap_or(Err(CANCELLED.into()))
             }
             other => Err(format!("{} isn't a system package", other.label())),
         }
@@ -1260,6 +1284,20 @@ mod tests {
         assert_eq!(results, vec![Err(error.to_string()); 2]);
     }
 
+    #[cfg(target_os = "linux")]
+    #[test]
+    fn flatpak_bundle_install_failure_reports_clean_error() {
+        if !crate::process::is_flatpak_available() {
+            return;
+        }
+        let queue = crate::queue::Queue::new();
+        let root = linux::Root { queue: &queue, run: &|_| Ok(()) };
+        let result = linux::install_package_via(&root, PackageKind::Flatpak, Path::new("/nonexistent/file.flatpak"), &Stop::default(), &mut |_| ());
+        assert!(result.is_err());
+        let err = result.unwrap_err();
+        assert!(err.starts_with("Flatpak couldn't install the bundle: "), "unexpected error: {err}");
+    }
+
     #[cfg(target_os = "linux")]
     #[test]
     fn adds_and_removes_only_its_own_menu_entry_and_icon() {
diff --git a/crates/ui-egui/src/app.rs b/crates/ui-egui/src/app.rs
index 16d0591..21a8936 100644
--- a/crates/ui-egui/src/app.rs
+++ b/crates/ui-egui/src/app.rs
@@ -407,6 +407,7 @@ impl LauncherUi {
             })
             .collect();
         for (id, version) in to_update {
+            log::info!("auto-update: queuing update for {id} to {version}");
             self.auto_update_attempted.insert((id.clone(), version));
             self.send(Command::Install { app: id });
         }
@@ -417,6 +418,7 @@ impl LauncherUi {
             let id = artcraft_launcher_core::catalog::LAUNCHER_ID.to_string();
             let v = r.version_label();
             if !self.auto_update_attempted.contains(&(id.clone(), v.clone())) {
+                log::info!("auto-update: queuing launcher self-update to {v}");
                 self.auto_update_attempted.insert((id, v));
                 self.send(Command::UpdateLauncher);
             }