diff --git a/compressor/base.py b/compressor/base.py
index b13d3c9..8f24b0d 100644
--- a/compressor/base.py
+++ b/compressor/base.py
@@ -111,9 +111,10 @@ class Compressor(object):
             command = self.all_mimetypes.get(mimetype)
             if command is None:
                 if mimetype not in ("text/css", "text/javascript"):
-                    raise CompressorError(
-                        "Couldn't find any configured precompiler "
-                        "for mimetype '%s'." % mimetype)
+                    error = ("Couldn't find any precompiler in "
+                             "COMPRESS_PRECOMPILERS setting for "
+                             "mimetype '%s'." % mimetype)
+                    raise CompressorError(error)
             else:
                 content = CompilerFilter(content, filter_type=self.type,
                                          command=command).output(**kwargs)
@@ -178,7 +179,7 @@ class Compressor(object):
         The output method that saves the content to a file and renders
         the appropriate template with the file's URL.
         """
-        new_filepath = self.filepath(content)
+        new_filepath = self.filepath(self.content)
         if not self.storage.exists(new_filepath):
             self.storage.save(new_filepath, ContentFile(content))
         url = self.storage.url(new_filepath)
diff --git a/compressor/cache.py b/compressor/cache.py
index f832b4d..e53f4b8 100644
--- a/compressor/cache.py
+++ b/compressor/cache.py
@@ -9,7 +9,7 @@ from compressor.conf import settings
 
 
 def get_hexdigest(plaintext, length=None):
-    digest = sha_constructor(plaintext).hexdigest()
+    digest = sha_constructor(smart_str(plaintext)).hexdigest()
     if length:
         return digest[:length]
     return digest
diff --git a/compressor/css.py b/compressor/css.py
index 90f5c0f..9f4ae58 100644
--- a/compressor/css.py
+++ b/compressor/css.py
@@ -37,7 +37,7 @@ class CssCompressor(Compressor):
                 if self.media_nodes and self.media_nodes[-1][0] == media:
                     self.media_nodes[-1][1].split_content.append(data)
                 else:
-                    node = CssCompressor()
+                    node = CssCompressor(str(elem))
                     node.split_content.append(data)
                     self.media_nodes.append((media, node))
         return self.split_content
diff --git a/compressor/tests/tests.py b/compressor/tests/tests.py
index 49d21a9..0f5a580 100644
--- a/compressor/tests/tests.py
+++ b/compressor/tests/tests.py
@@ -72,10 +72,10 @@ class CompressorTestCase(TestCase):
         self.assert_(is_cachekey.match(self.css_node.cachekey), "cachekey is returning something that doesn't look like r'django_compressor\.%s\.\w{12}'" % host_name)
 
     def test_css_hash(self):
-        self.assertEqual('f7c661b7a124', self.css_node.hash(self.css_node.concat))
+        self.assertEqual('666f3aa8eacd', self.css_node.hash(self.css))
 
     def test_css_return_if_on(self):
-        output = u'<link rel="stylesheet" href="/media/CACHE/css/f7c661b7a124.css" type="text/css">'
+        output = u'<link rel="stylesheet" href="/media/CACHE/css/277b26db9a98.css" type="text/css">'
         self.assertEqual(output, self.css_node.output().strip())
 
     def test_js_split(self):
@@ -110,20 +110,20 @@ class CompressorTestCase(TestCase):
             settings.COMPRESS_PRECOMPILERS = precompilers
 
     def test_js_return_if_on(self):
-        output = u'<script type="text/javascript" src="/media/CACHE/js/3f33b9146e12.js" charset="utf-8"></script>'
+        output = u'<script type="text/javascript" src="/media/CACHE/js/dc78a3f5af20.js" charset="utf-8"></script>'
         self.assertEqual(output, self.js_node.output())
 
     def test_custom_output_dir(self):
         try:
             old_output_dir = settings.COMPRESS_OUTPUT_DIR
             settings.COMPRESS_OUTPUT_DIR = 'custom'
-            output = u'<script type="text/javascript" src="/media/custom/js/3f33b9146e12.js" charset="utf-8"></script>'
+            output = u'<script type="text/javascript" src="/media/custom/js/dc78a3f5af20.js" charset="utf-8"></script>'
             self.assertEqual(output, JsCompressor(self.js).output())
             settings.COMPRESS_OUTPUT_DIR = ''
-            output = u'<script type="text/javascript" src="/media/js/3f33b9146e12.js" charset="utf-8"></script>'
+            output = u'<script type="text/javascript" src="/media/js/dc78a3f5af20.js" charset="utf-8"></script>'
             self.assertEqual(output, JsCompressor(self.js).output())
             settings.COMPRESS_OUTPUT_DIR = '/custom/nested/'
-            output = u'<script type="text/javascript" src="/media/custom/nested/js/3f33b9146e12.js" charset="utf-8"></script>'
+            output = u'<script type="text/javascript" src="/media/custom/nested/js/dc78a3f5af20.js" charset="utf-8"></script>'
             self.assertEqual(output, JsCompressor(self.js).output())
         finally:
             settings.COMPRESS_OUTPUT_DIR = old_output_dir
@@ -290,7 +290,7 @@ class TemplatetagTestCase(TestCase):
         {% endcompress %}
         """
         context = { 'MEDIA_URL': settings.COMPRESS_URL }
-        out = u'<link rel="stylesheet" href="/media/CACHE/css/f7c661b7a124.css" type="text/css">'
+        out = u'<link rel="stylesheet" href="/media/CACHE/css/277b26db9a98.css" type="text/css">'
         self.assertEqual(out, render(template, context))
 
     def test_nonascii_css_tag(self):
@@ -300,7 +300,7 @@ class TemplatetagTestCase(TestCase):
         {% endcompress %}
         """
         context = { 'MEDIA_URL': settings.COMPRESS_URL }
-        out = '<link rel="stylesheet" href="/media/CACHE/css/1c1c0855907b.css" type="text/css">'
+        out = '<link rel="stylesheet" href="/media/CACHE/css/14e62fd8dc94.css" type="text/css">'
         self.assertEqual(out, render(template, context))
 
     def test_js_tag(self):
@@ -310,7 +310,7 @@ class TemplatetagTestCase(TestCase):
         {% endcompress %}
         """
         context = { 'MEDIA_URL': settings.COMPRESS_URL }
-        out = u'<script type="text/javascript" src="/media/CACHE/js/3f33b9146e12.js" charset="utf-8"></script>'
+        out = u'<script type="text/javascript" src="/media/CACHE/js/dc78a3f5af20.js" charset="utf-8"></script>'
         self.assertEqual(out, render(template, context))
 
     def test_nonascii_js_tag(self):
@@ -320,7 +320,7 @@ class TemplatetagTestCase(TestCase):
         {% endcompress %}
         """
         context = { 'MEDIA_URL': settings.COMPRESS_URL }
-        out = u'<script type="text/javascript" src="/media/CACHE/js/5d5c0e1cb25f.js" charset="utf-8"></script>'
+        out = u'<script type="text/javascript" src="/media/CACHE/js/52e783c7eb25.js" charset="utf-8"></script>'
         self.assertEqual(out, render(template, context))
 
     def test_nonascii_latin1_js_tag(self):
@@ -330,7 +330,7 @@ class TemplatetagTestCase(TestCase):
         {% endcompress %}
         """
         context = { 'MEDIA_URL': settings.COMPRESS_URL }
-        out = u'<script type="text/javascript" src="/media/CACHE/js/40a8e9ffb476.js" charset="utf-8"></script>'
+        out = u'<script type="text/javascript" src="/media/CACHE/js/e33dbf2e2457.js" charset="utf-8"></script>'
         self.assertEqual(out, render(template, context))
 
     def test_compress_tag_with_illegal_arguments(self):
@@ -357,7 +357,7 @@ class StorageTestCase(TestCase):
         {% endcompress %}
         """
         context = { 'MEDIA_URL': settings.COMPRESS_URL }
-        out = u'<link rel="stylesheet" href="/media/CACHE/css/5b231a62e9a6.css.gz" type="text/css">'
+        out = u'<link rel="stylesheet" href="/media/CACHE/css/277b26db9a98.css.gz" type="text/css">'
         self.assertEqual(out, render(template, context))
 
 
@@ -377,6 +377,7 @@ class CacheBackendTestCase(CompressorTestCase):
 
 class OfflineGenerationTestCase(TestCase):
     """Uses templates/test_compressor_offline.html"""
+    maxDiff = None
 
     def setUp(self):
         self._old_compress = settings.COMPRESS_ENABLED
@@ -389,8 +390,8 @@ class OfflineGenerationTestCase(TestCase):
         count, result = CompressCommand().compress()
         self.assertEqual(2, count)
         self.assertEqual([
-            u'<link rel="stylesheet" href="/media/CACHE/css/a55e1cf95000.css" type="text/css">\n',
-            u'<script type="text/javascript" src="/media/CACHE/js/bf53fa5b13e2.js" charset="utf-8"></script>',
+            u'<link rel="stylesheet" href="/media/CACHE/css/4208e0ded309.css" type="text/css">\n',
+            u'<script type="text/javascript" src="/media/CACHE/js/f57529d83f3a.js" charset="utf-8"></script>',
         ], result)
 
     def test_offline_with_context(self):
@@ -401,7 +402,7 @@ class OfflineGenerationTestCase(TestCase):
         count, result = CompressCommand().compress()
         self.assertEqual(2, count)
         self.assertEqual([
-            u'<link rel="stylesheet" href="/media/CACHE/css/8a2405e029de.css" type="text/css">\n',
-            u'<script type="text/javascript" src="/media/CACHE/js/bf53fa5b13e2.js" charset="utf-8"></script>',
+            u'<link rel="stylesheet" href="/media/CACHE/css/777d7c22e67c.css" type="text/css">\n',
+            u'<script type="text/javascript" src="/media/CACHE/js/f57529d83f3a.js" charset="utf-8"></script>',
         ], result)
         settings.COMPRESS_OFFLINE_CONTEXT = self._old_offline_context