diff --git a/src/calibre/ebooks/metadata/sources/base.py b/src/calibre/ebooks/metadata/sources/base.py
index 54d7d49d6d..142224c599 100644
--- a/src/calibre/ebooks/metadata/sources/base.py
+++ b/src/calibre/ebooks/metadata/sources/base.py
@@ -65,7 +65,8 @@ class Source(Plugin):
                     parts = parts[1:] + parts[:1]
                 for tok in parts:
                     tok = pat.sub('', tok).strip()
-                    yield tok
+                    if len(tok) > 2 and tok.lower() not in ('von', ):
+                        yield tok
 
 
     def get_title_tokens(self, title):
diff --git a/src/calibre/utils/ipc/launch.py b/src/calibre/utils/ipc/launch.py
index 28d5d889e3..bc7927aa11 100644
--- a/src/calibre/utils/ipc/launch.py
+++ b/src/calibre/utils/ipc/launch.py
@@ -94,7 +94,14 @@ class Worker(object):
         if not hasattr(self, 'child'): return None
         return getattr(self.child, 'pid', None)
 
+    def close_log_file(self):
+        try:
+            self._file.close()
+        except:
+            pass
+
     def kill(self):
+        self.close_log_file()
         try:
             if self.is_alive:
                 if iswindows:
diff --git a/src/calibre/utils/ipc/server.py b/src/calibre/utils/ipc/server.py
index 4d35113d80..e3b7bfd449 100644
--- a/src/calibre/utils/ipc/server.py
+++ b/src/calibre/utils/ipc/server.py
@@ -34,6 +34,7 @@ class ConnectedWorker(Thread):
         self.killed = False
         self.log_path = worker.log_path
         self.rfile = rfile
+        self.close_log_file = getattr(worker, 'close_log_file', None)
 
     def start_job(self, job):
         notification = PARALLEL_FUNCS[job.name][-1] is not None
@@ -185,6 +186,10 @@ class Server(Thread):
 
             # Remove finished jobs
             for worker in [w for w in self.workers if not w.is_alive]:
+                try:
+                    worker.close_log_file()
+                except:
+                    pass
                 self.workers.remove(worker)
                 job = worker.job
                 if worker.returncode != 0: