diff --git a/dictionary.cc b/dictionary.cc
index c0d14c0f..fe395f11 100644
--- a/dictionary.cc
+++ b/dictionary.cc
@@ -21,6 +21,7 @@
 
 #include <QImage>
 #include <QPainter>
+#include <QRegExp>
 
 namespace Dictionary {
 
@@ -248,6 +249,122 @@ bool Class::loadIconFromFile( QString const & _filename, bool isFullName )
   return false;
 }
 
+void Class::isolateCSS( QString & css )
+{
+  if( css.isEmpty() )
+    return;
+
+  int currentPos = 0;
+  QString newCSS;
+  QString prefix( "span#gdfrom-" );
+  prefix += QString::fromLatin1( getId().c_str() );
+
+  // Strip comments
+  css.replace( QRegExp( "\\/\\*[^*]*\\*+([^/][^*]*\\*+)*\\/" ), QString() );
+
+  for( ; ; )
+  {
+    if( currentPos >= css.length() )
+      break;
+    QChar ch = css[ currentPos ];
+
+    if( ch == '@' )
+    {
+      // @ rules
+
+      int n = currentPos;
+      if( css.mid( currentPos, 7 ).compare( "@import", Qt::CaseInsensitive ) == 0 )
+      {
+        // Copy rule as is.
+        n = css.indexOf( ';', currentPos );
+        int n2 = css.indexOf( '{', currentPos );
+        if( n2 > 0 && n > n2 )
+          n = n2 - 1;
+      }
+      else
+      if( css.mid( currentPos, 6 ).compare( "@media", Qt::CaseInsensitive ) == 0 )
+      {
+        // We must to parse it content to isolate it.
+        // Copy all up to '{' and continue parse inside.
+        n = css.indexOf( '{', currentPos );
+      }
+      else
+      if( css.mid( currentPos, 5 ).compare( "@page", Qt::CaseInsensitive ) == 0 )
+      {
+        // Don't copy rule. GD use own page layout.
+        n = css.indexOf( '}', currentPos );
+        if( n < 0 )
+          break;
+        currentPos = n + 1;
+        continue;
+      }
+      else
+      {
+        // Copy rule as is.
+        n = css.indexOf( '}', currentPos );
+      }
+
+      newCSS.append( css.mid( currentPos, n < 0 ? n : n - currentPos + 1 ) );
+
+      if( n < 0 )
+        break;
+
+      currentPos = n + 1;
+      continue;
+    }
+
+    if( ch == '{' )
+    {
+      // Selector declaration block.
+      // We copy it up to '}' as is.
+
+      int n = css.indexOf( '}', currentPos );
+      newCSS.append( css.mid( currentPos, n == -1 ? n : n - currentPos + 1 ) );
+      if( n < 0 )
+        break;
+      currentPos = n + 1;
+      continue;
+    }
+
+    if( ch.isLetter() || ch == '.' || ch == '#' || ch == '*' || ch == '\\' )
+    {
+      // This is some selector.
+      // We must to add the isolate prefix to it.
+
+      int n = css.indexOf( QRegExp( "[ \\*\\>\\+,;:\\[\\{\\]]" ), currentPos + 1 );
+      QString s = css.mid( currentPos, n < 0 ? n : n - currentPos );
+      if( n < 0 )
+      {
+        newCSS.append( s );
+        break;
+      }
+      QString trimmed = s.trimmed();
+      if( trimmed.compare( "body", Qt::CaseInsensitive ) == 0
+          || trimmed.compare( "html", Qt::CaseInsensitive ) == 0 )
+      {
+        newCSS.append( s + " " + prefix + " " );
+        currentPos += 4;
+      }
+      else
+      {
+        newCSS.append( prefix + " " );
+      }
+
+      n = css.indexOf( QRegExp( "[,;\\{]" ), currentPos );
+      s = css.mid( currentPos, n < 0 ? n : n - currentPos );
+      newCSS.append( s );
+      if( n < 0 )
+        break;
+      currentPos = n;
+      continue;
+    }
+
+    newCSS.append( ch );
+    ++currentPos;
+  }
+  css = newCSS;
+}
+
 string makeDictionaryId( vector< string > const & dictionaryFiles ) throw()
 {
   std::vector< string > sortedList;
diff --git a/dictionary.hh b/dictionary.hh
index 456500a9..2b32bc8e 100644
--- a/dictionary.hh
+++ b/dictionary.hh
@@ -267,6 +267,9 @@ protected:
   // else treat filename as name without extension
   bool loadIconFromFile( QString const & filename, bool isFullName = false );
 
+  /// Make css content usable only for articles from this dictionary
+  void isolateCSS( QString & css );
+
 public:
 
   /// Creates a dictionary. The id should be made using
diff --git a/filetype.cc b/filetype.cc
index 8d055f56..aca3dbfc 100644
--- a/filetype.cc
+++ b/filetype.cc
@@ -94,4 +94,12 @@ bool isNameOfTiff( string const & name )
     endsWith( s, ".tiff" );
 }
 
+bool isNameOfCSS( string const & name )
+{
+  string s = simplifyString( name );
+
+  return
+    endsWith( s, ".css" );
+}
+
 }
diff --git a/filetype.hh b/filetype.hh
index 5e980220..30379f96 100644
--- a/filetype.hh
+++ b/filetype.hh
@@ -21,6 +21,8 @@ bool isNameOfPicture( string const & );
 /// with .tif or tiff). We have this one separately since we need to reconvert
 /// TIFF files as WebKit doesn't seem to support them.
 bool isNameOfTiff( string const & );
+/// Returns true if the name resembles the one of a .css file
+bool isNameOfCSS( string const & );
 
 }
 
diff --git a/mdx.cc b/mdx.cc
index b4f051b8..5e4c71de 100644
--- a/mdx.cc
+++ b/mdx.cc
@@ -15,6 +15,7 @@
 #include "audiolink.hh"
 #include "ex.hh"
 #include "mdictparser.hh"
+#include "filetype.hh"
 
 #include <map>
 #include <set>
@@ -263,9 +264,6 @@ private:
   /// Process resource links (images, audios, etc)
   QString & filterResource( QString const & articleId, QString & article );
 
-  /// Make css content usable only for articles from this dictionary
-  void isolateCSS( QString & css );
-
   friend class MdxHeadwordsRequest;
   friend class MdxArticleRequest;
   friend class MddResourceRequest;
@@ -737,17 +735,16 @@ void MddResourceRequest::run()
         }
       }
 
-      hasAnyData = true;
-    }
+      if( Filetype::isNameOfCSS( u8ResourceName ) )
+      {
+        QString css = QString::fromUtf8( data.data(), data.size() );
+        dict.isolateCSS( css );
+        QByteArray bytes = css.toUtf8();
+        data.resize( bytes.size() );
+        memcpy( &data.front(), bytes.constData(), bytes.size() );
+      }
 
-    QString name = gd::toQString( resourceName );
-    if( name.endsWith( ".css" ) )
-    {
-      QString css = QString::fromUtf8( data.data(), data.size() );
-      dict.isolateCSS( css );
-      QByteArray bytes = css.toUtf8();
-      data.resize( bytes.size() );
-      memcpy( &data.front(), bytes.constData(), bytes.size() );
+      hasAnyData = true;
     }
 
     break;
@@ -756,122 +753,6 @@ void MddResourceRequest::run()
   finish();
 }
 
-void MdxDictionary::isolateCSS( QString & css )
-{
-  if( css.isEmpty() )
-    return;
-
-  int currentPos = 0;
-  QString newCSS;
-  QString prefix( "span#gdfrom-" );
-  prefix += QString::fromLatin1( getId().c_str() );
-
-  // Strip comments
-  css.replace( QRegExp( "\\/\\*[^*]*\\*+([^/][^*]*\\*+)*\\/" ), QString() );
-
-  for( ; ; )
-  {
-    if( currentPos >= css.length() )
-      break;
-    QChar ch = css[ currentPos ];
-
-    if( ch == '@' )
-    {
-      // @ rules
-
-      int n = currentPos;
-      if( css.mid( currentPos, 7 ).compare( "@import", Qt::CaseInsensitive ) == 0 )
-      {
-        // Copy rule as is.
-        n = css.indexOf( ';', currentPos );
-        int n2 = css.indexOf( '{', currentPos );
-        if( n2 > 0 && n > n2 )
-          n = n2 - 1;
-      }
-      else
-      if( css.mid( currentPos, 6 ).compare( "@media", Qt::CaseInsensitive ) == 0 )
-      {
-        // We must to parse it content to isolate it.
-        // Copy all up to '{' and continue parse inside.
-        n = css.indexOf( '{', currentPos );
-      }
-      else
-      if( css.mid( currentPos, 5 ).compare( "@page", Qt::CaseInsensitive ) == 0 )
-      {
-        // Don't copy rule. GD use own page layout.
-        n = css.indexOf( '}', currentPos );
-        if( n < 0 )
-          break;
-        currentPos = n + 1;
-        continue;
-      }
-      else
-      {
-        // Copy rule as is.
-        n = css.indexOf( '}', currentPos );
-      }
-
-      newCSS.append( css.mid( currentPos, n < 0 ? n : n - currentPos + 1 ) );
-
-      if( n < 0 )
-        break;
-
-      currentPos = n + 1;
-      continue;
-    }
-
-    if( ch == '{' )
-    {
-      // Selector declaration block.
-      // We copy it up to '}' as is.
-
-      int n = css.indexOf( '}', currentPos );
-      newCSS.append( css.mid( currentPos, n == -1 ? n : n - currentPos + 1 ) );
-      if( n < 0 )
-        break;
-      currentPos = n + 1;
-      continue;
-    }
-
-    if( ch.isLetter() || ch == '.' || ch == '#' || ch == '*' || ch == '\\' )
-    {
-      // This is some selector.
-      // We must to add the isolate prefix to it.
-
-      int n = css.indexOf( QRegExp( "[ \\*\\>\\+,;:\\[\\{\\]]" ), currentPos + 1 );
-      QString s = css.mid( currentPos, n < 0 ? n : n - currentPos );
-      if( n < 0 )
-      {
-        newCSS.append( s );
-        break;
-      }
-      QString trimmed = s.trimmed();
-      if( trimmed.compare( "body", Qt::CaseInsensitive ) == 0
-          || trimmed.compare( "html", Qt::CaseInsensitive ) == 0 )
-      {
-        newCSS.append( s + " " + prefix + " " );
-        currentPos += 4;
-      }
-      else
-      {
-        newCSS.append( prefix + " " );
-      }
-
-      n = css.indexOf( QRegExp( "[,;\\{]" ), currentPos );
-      s = css.mid( currentPos, n < 0 ? n : n - currentPos );
-      newCSS.append( s );
-      if( n < 0 )
-        break;
-      currentPos = n;
-      continue;
-    }
-
-    newCSS.append( ch );
-    ++currentPos;
-  }
-  css = newCSS;
-}
-
 sptr<Dictionary::DataRequest> MdxDictionary::getResource( const string & name ) throw( std::exception )
 {
   return new MddResourceRequest( *this, name );
diff --git a/stardict.cc b/stardict.cc
index 9f26123c..eead0451 100644
--- a/stardict.cc
+++ b/stardict.cc
@@ -1084,7 +1084,16 @@ void StardictResourceRequest::run()
       }
     }
 
-    Mutex::Lock _( dataMutex );
+    if( Filetype::isNameOfCSS( resourceName ) )
+    {
+      Mutex::Lock _( dataMutex );
+
+      QString css = QString::fromUtf8( data.data(), data.size() );
+      dict.isolateCSS( css );
+      QByteArray bytes = css.toUtf8();
+      data.resize( bytes.size() );
+      memcpy( &data.front(), bytes.constData(), bytes.size() );
+    }
 
     hasAnyData = true;
   }