diff --git a/src/calibre/__init__.py b/src/calibre/__init__.py
index 7c9638ade1..0bf48a8a97 100644
--- a/src/calibre/__init__.py
+++ b/src/calibre/__init__.py
@@ -4,8 +4,7 @@ __copyright__ = '2008, Kovid Goyal <kovid@kovidgoyal.net>'
 __docformat__ = 'restructuredtext en'
 
 import uuid, sys, os, re, logging, time, random, \
-       __builtin__, warnings, multiprocessing
-from contextlib import closing
+       __builtin__, warnings
 from urllib import getproxies
 from urllib2 import unquote as urllib2_unquote
 __builtin__.__dict__['dynamic_property'] = lambda(func): func(None)
@@ -383,6 +382,7 @@ class StreamReadWrapper(object):
 
 def detect_ncpus():
     """Detects the number of effective CPUs in the system"""
+    import multiprocessing
     ans = -1
     try:
         ans = multiprocessing.cpu_count()
@@ -547,6 +547,7 @@ def get_download_filename(url, cookie_file=None):
     '''
     Get a local filename for a URL using the content disposition header
     '''
+    from contextlib import closing
     filename = ''
 
     br = browser()
diff --git a/src/calibre/ebooks/conversion/plumber.py b/src/calibre/ebooks/conversion/plumber.py
index b26befe075..8706d6eb2b 100644
--- a/src/calibre/ebooks/conversion/plumber.py
+++ b/src/calibre/ebooks/conversion/plumber.py
@@ -875,6 +875,8 @@ OptionRecommendation(name='sr3_replace',
         if self.opts.verbose:
             self.log.filter_level = self.log.DEBUG
         self.flush()
+        import cssutils, logging
+        cssutils.log.setLevel(logging.WARN)
 
         if self.opts.debug_pipeline is not None:
             self.opts.verbose = max(self.opts.verbose, 4)