diff --git a/engine/VERSION b/engine/VERSION
index 944880f..e4604e3 100644
--- a/engine/VERSION
+++ b/engine/VERSION
@@ -1 +1 @@
-3.2.0
+3.2.1
diff --git a/engine/kb/database.py b/engine/kb/database.py
index 05acec6..8a0c0dc 100644
--- a/engine/kb/database.py
+++ b/engine/kb/database.py
@@ -74,6 +74,7 @@ def get_connection(db_path: str) -> sqlite3.Connection:
     conn.enable_load_extension(False)
     conn.row_factory = sqlite3.Row
     conn.execute("PRAGMA journal_mode=WAL")
+    conn.execute("PRAGMA busy_timeout=5000")
     conn.execute("PRAGMA foreign_keys=ON")
     return conn
 
diff --git a/engine/kb/staging.py b/engine/kb/staging.py
index c84acaf..671d2c1 100644
--- a/engine/kb/staging.py
+++ b/engine/kb/staging.py
@@ -16,7 +16,8 @@ def stage_file(staging_dir: Path, filename: str, content: bytes) -> Path:
         The path to the newly created staged file.
     """
     staging_dir.mkdir(parents=True, exist_ok=True)
-    dest = staging_dir / f"{uuid.uuid4()}_{filename}"
+    safe_filename = filename.replace("/", "_").replace("\\", "_")
+    dest = staging_dir / f"{uuid.uuid4()}_{safe_filename}"
     dest.write_bytes(content)
     logger.debug("Staged file: %s (%d bytes)", dest, len(content))
     return dest
@@ -31,7 +32,8 @@ def stage_note(staging_dir: Path, title: str, text: str) -> Path:
         The path to the newly created staged note file.
     """
     staging_dir.mkdir(parents=True, exist_ok=True)
-    dest = staging_dir / f"{uuid.uuid4()}_{title}.note"
+    safe_title = title.replace("/", "_").replace("\\", "_")
+    dest = staging_dir / f"{uuid.uuid4()}_{safe_title}.note"
     dest.write_text(text, encoding="utf-8")
     logger.debug("Staged note: %s (%d chars)", dest, len(text))
     return dest