diff --git a/.github/workflows/build-and-release.yml b/.github/workflows/build-and-release.yml
index 29be5537..3d56d82c 100644
--- a/.github/workflows/build-and-release.yml
+++ b/.github/workflows/build-and-release.yml
@@ -256,6 +256,14 @@ jobs:
       PDFIUM_CHROMIUM_REVISION: ${{ needs.read_metadata.outputs.pdfium_chromium_revision }}
 
     steps:
+      - name: Checkout AI Studio release metadata
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ env.AI_STUDIO_COMMIT }}
+          path: ai-studio
+          sparse-checkout: metadata.txt
+          sparse-checkout-cone-mode: false
+
       - name: Checkout Flatpak repository
         uses: actions/checkout@v4
         with:
@@ -315,6 +323,15 @@ jobs:
         run: |
           set -euo pipefail
 
+          release_version=$(sed -n '1p' ../ai-studio/metadata.txt)
+          release_timestamp=$(sed -n '2p' ../ai-studio/metadata.txt)
+          release_date=${release_timestamp%% *}
+
+          test "$release_version" = "${AI_STUDIO_TAG#v}"
+          [[ "$release_timestamp" =~ ^[0-9]{4}-[0-9]{2}-[0-9]{2}[[:space:]][0-9]{2}:[0-9]{2}:[0-9]{2}[[:space:]]UTC$ ]]
+          python3 ./update-metainfo.py "$release_version" "$release_date"
+          python3 ./update-metainfo.py --check "$release_version" "$release_date"
+
           pdfium_base_url="https://github.com/bblanchon/pdfium-binaries/releases/download/chromium%2F${PDFIUM_CHROMIUM_REVISION}"
           pdfium_x64_url="${pdfium_base_url}/pdfium-linux-x64.tgz"
           pdfium_arm64_url="${pdfium_base_url}/pdfium-linux-arm64.tgz"
@@ -368,7 +385,7 @@ jobs:
 
           branch="sync/ai-studio-${AI_STUDIO_TAG}"
           git checkout -B "$branch"
-          git add org.MindWorkAI.AIStudio.yml cargo-sources.json dotnet-sources.json tauri-cli-sources.json
+          git add org.MindWorkAI.AIStudio.yml org.MindWorkAI.AIStudio.metainfo.xml cargo-sources.json dotnet-sources.json tauri-cli-sources.json
 
           if git diff --cached --quiet; then
             echo "Flatpak repository is already synced for ${AI_STUDIO_TAG}."
diff --git a/app/MindWork AI Studio/wwwroot/changelog/v26.7.3.md b/app/MindWork AI Studio/wwwroot/changelog/v26.7.3.md
index 10d18f05..da17b9d1 100644
--- a/app/MindWork AI Studio/wwwroot/changelog/v26.7.3.md	
+++ b/app/MindWork AI Studio/wwwroot/changelog/v26.7.3.md	
@@ -13,6 +13,7 @@
 - Fixed voice recording and transcription on Linux.
 - Fixed being able to switch document analysis policies while an analysis or media transcription was still in progress.
 - Fixed file extension handling so files are recognized correctly regardless of uppercase or lowercase letters in their extensions. Thanks, Paul Schweiß, for reporting this issue.
+- Fixed AI Studio failing to start on Linux systems & showing an outdated version on the Flatpak page.
 - Upgraded Rust to v1.97.0.
 - Upgraded .NET to v9.0.18.
 - Upgraded Tauri to v2.11.5.
diff --git a/runtime/src/main.rs b/runtime/src/main.rs
index a75f73eb..b41b4c64 100644
--- a/runtime/src/main.rs
+++ b/runtime/src/main.rs
@@ -12,8 +12,21 @@ use mindwork_ai_studio::metadata::MetaData;
 use mindwork_ai_studio::runtime_api::start_runtime_api;
 use mindwork_ai_studio::secret::init_secret_store;
 
-#[tokio::main]
-async fn main() {
+// Keep `main` synchronous. Tauri owns the application's Tokio runtime, and Tauri itself as
+// well as synchronous plugins may internally call `block_on` while they are initialized.
+// In v26.7.3, `#[tokio::main]` caused the Linux single-instance plugin's synchronous D-Bus
+// setup to enter `block_on` through zbus/tokio. Cargo feature unification made that path use
+// Tokio, so startup panicked because a runtime was being started from inside another runtime.
+//
+// Run asynchronous background work with `tauri::async_runtime::spawn`. If startup must await
+// asynchronous work, call `tauri::async_runtime::block_on` from this synchronous function
+// before Tauri enters its event loop. If a real `#[tokio::main]` ever becomes unavoidable,
+// first call `tauri::async_runtime::set(tokio::runtime::Handle::current())` before using any
+// Tauri async function. Then audit every synchronously initialized Tauri plugin and transitive
+// dependency for internal `block_on` calls. In particular, the Linux single-instance/D-Bus
+// path must be made async, replaced, or moved to a non-conflicting backend. Such a runtime
+// change requires explicit Linux startup tests; compiling successfully is not sufficient.
+fn main() {
     let metadata = MetaData::init_from_string(include_str!("../../metadata.txt"));
 
     init_logging();