diff --git a/Cargo.lock b/Cargo.lock
index 8fca056..e8b0e2d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1652,7 +1652,7 @@ checksum = "09edd9e8b54e49e587e4f6295a7d29c3ea94d469cb40ab8ca70b288248a81db2"
 
 [[package]]
 name = "lesavka_client"
-version = "0.22.9"
+version = "0.22.10"
 dependencies = [
  "anyhow",
  "async-stream",
@@ -1686,7 +1686,7 @@ dependencies = [
 
 [[package]]
 name = "lesavka_common"
-version = "0.22.9"
+version = "0.22.10"
 dependencies = [
  "anyhow",
  "base64",
@@ -1698,7 +1698,7 @@ dependencies = [
 
 [[package]]
 name = "lesavka_server"
-version = "0.22.9"
+version = "0.22.10"
 dependencies = [
  "anyhow",
  "base64",
diff --git a/client/Cargo.toml b/client/Cargo.toml
index b4d40c5..bec7c47 100644
--- a/client/Cargo.toml
+++ b/client/Cargo.toml
@@ -4,7 +4,7 @@ path                    = "src/main.rs"
 
 [package]
 name                    = "lesavka_client"
-version                 = "0.22.9"
+version                 = "0.22.10"
 edition                 = "2024"
 
 [dependencies]
diff --git a/common/Cargo.toml b/common/Cargo.toml
index 906f695..236f389 100644
--- a/common/Cargo.toml
+++ b/common/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name                    = "lesavka_common"
-version                 = "0.22.9"
+version                 = "0.22.10"
 edition                 = "2024"
 build                   = "build.rs"
 
diff --git a/scripts/install/client.sh b/scripts/install/client.sh
index 18aa91e..cf4941e 100755
--- a/scripts/install/client.sh
+++ b/scripts/install/client.sh
@@ -332,6 +332,33 @@ install_verified_executable() {
   sudo chmod 0755 "$dest"
 }
 
+warn_running_stale_client_processes() {
+  local installed=/usr/local/bin/lesavka-client
+  local installed_inode=""
+  installed_inode=$(stat -Lc '%i' "$installed" 2>/dev/null || true)
+  local stale=()
+  local pid exe exe_inode cmd
+
+  while read -r pid; do
+    [[ -n "$pid" ]] || continue
+    exe=$(readlink "/proc/$pid/exe" 2>/dev/null || true)
+    [[ -n "$exe" ]] || continue
+    exe_inode=$(stat -Lc '%i' "/proc/$pid/exe" 2>/dev/null || true)
+    if [[ "$exe" == *" (deleted)"* || ( -n "$installed_inode" && "$exe_inode" != "$installed_inode" ) ]]; then
+      cmd=$(tr '\0' ' ' <"/proc/$pid/cmdline" 2>/dev/null || true)
+      stale+=("pid=$pid exe=$exe cmd=${cmd:-unknown}")
+    fi
+  done < <(pgrep -u "$ORIG_USER" -f '(^|/)(lesavka|lesavka-client)( |$|--)' 2>/dev/null || true)
+
+  if ((${#stale[@]} == 0)); then
+    return
+  fi
+
+  echo "⚠️  Lesavka is still running from an older/deleted binary."
+  echo "    Close and relaunch Lesavka before judging video/audio performance from this install."
+  printf '    %s\n' "${stale[@]}"
+}
+
 pacman_install() {
   local log_file
   log_file=$(mktemp --tmpdir="$TMPDIR" lesavka-pacman.XXXXXX.log)
@@ -567,6 +594,7 @@ echo "   Desktop entry: /usr/share/applications/lesavka.desktop"
 echo "   Build source: $SRC/target/release/lesavka-client"
 echo "   TLS identity: $CLIENT_PKI_DIR"
 echo "   Captures: $CLIENT_CAPTURE_DIR"
+warn_running_stale_client_processes
 echo "✅  Installed version: lesavka-client ${INSTALLED_VERSION:-unknown}${INSTALLED_SHA:+ ($INSTALLED_SHA)}"
 echo
 echo "Quick start:"
diff --git a/server/Cargo.toml b/server/Cargo.toml
index bb9e232..ffd58b9 100644
--- a/server/Cargo.toml
+++ b/server/Cargo.toml
@@ -10,7 +10,7 @@ bench                   = false
 
 [package]
 name                    = "lesavka_server"
-version                 = "0.22.9"
+version                 = "0.22.10"
 edition                 = "2024"
 autobins                = false
 
diff --git a/tests/installer/scripts/install/client_install_script_contract.rs b/tests/installer/scripts/install/client_install_script_contract.rs
index 001bd2b..80661f9 100644
--- a/tests/installer/scripts/install/client_install_script_contract.rs
+++ b/tests/installer/scripts/install/client_install_script_contract.rs
@@ -84,7 +84,10 @@ fn client_install_reports_nvidia_and_open_source_media_routes() {
     for expected in [
         "report_client_media_acceleration",
         "refresh_gstreamer_registry_cache",
+        "warn_running_stale_client_processes",
         "Refreshing GStreamer plugin registry",
+        "Lesavka is still running from an older/deleted binary.",
+        "Close and relaunch Lesavka before judging video/audio performance",
         "run_as_user rm -f \"$USER_HOME/.cache/gstreamer-1.0\"/registry.*",
         "gst-inspect-1.0 nvcodec",
         "gst-inspect-1.0 va",