diff --git a/libgrive/src/drive/Drive.cc b/libgrive/src/drive/Drive.cc
index 258ce94..f0d454f 100644
--- a/libgrive/src/drive/Drive.cc
+++ b/libgrive/src/drive/Drive.cc
@@ -139,28 +139,32 @@ void Drive::DetectChanges()
 	SyncFolders( &http ) ;
 
 	Log( "Reading remote server file list", log::info ) ;
-	http::XmlResponse xrsp ;
-	http.Get( feed_base + "?showfolders=true&showroot=true", &xrsp, m_http_hdr ) ;
-	xml::Node resp = xrsp.Response() ;
-
-	m_resume_link = resp["link"].
+	Feed feed ;
+// 	feed.EnableLog( "/tmp/file", ".xml" ) ;
+	feed.Start( &http, m_http_hdr, feed_base + "?showfolders=true&showroot=true" ) ;
+	
+	m_resume_link = feed.Root()["link"].
 		Find( "@rel", "http://schemas.google.com/g/2005#resumable-create-media" )["@href"] ;
-
-	Feed feed( resp ) ;
+		
 	do
 	{
-		std::for_each( feed.begin(), feed.end(), boost::bind( &Drive::FromRemote, this, _1 ) ) ;
+		std::for_each(
+			feed.begin(), feed.end(),
+			boost::bind( &Drive::FromRemote, this, _1 ) ) ;
+			
 	} while ( feed.GetNext( &http, m_http_hdr ) ) ;
 	
 	// pull the changes feed
 	if ( prev_stamp != -1 )
 	{
-		http::ResponseLog log( "/tmp/changes-", ".xml", &xrsp ) ;
 		Log( "Detecting changes from last sync", log::info ) ;
-		http.Get( ChangesFeed(prev_stamp+1), &log, m_http_hdr ) ;
+		Feed changes ;
+// 		feed.EnableLog( "/tmp/changes", ".xml" ) ;
+		feed.Start( &http, m_http_hdr, ChangesFeed(prev_stamp+1) ) ;
 		
-		Feed changes( xrsp.Response() ) ;
-		std::for_each( changes.begin(), changes.end(), boost::bind( &Drive::FromChange, this, _1 ) ) ;
+		std::for_each(
+			changes.begin(), changes.end(),
+			boost::bind( &Drive::FromChange, this, _1 ) ) ;
 	}
 }
 
diff --git a/libgrive/src/drive/Feed.cc b/libgrive/src/drive/Feed.cc
index bbb1b7f..72bfa9a 100644
--- a/libgrive/src/drive/Feed.cc
+++ b/libgrive/src/drive/Feed.cc
@@ -20,13 +20,20 @@
 #include "Feed.hh"
 
 #include "http/Agent.hh"
+#include "http/ResponseLog.hh"
 #include "http/XmlResponse.hh"
 #include "xml/NodeSet.hh"
 
+#include <boost/format.hpp>
+
 #include <cassert>
 
 namespace gr {
 
+Feed::Feed( )
+{
+}
+
 Feed::Feed( const xml::Node& root ) :
 	m_root		( root ),
 	m_entries	( m_root["entry"] )
@@ -55,6 +62,22 @@ std::string Feed::Next() const
 	return nss.empty() ? "" : std::string(nss["@href"]) ;
 }
 
+void Feed::Start( http::Agent *http, const http::Header& auth, const std::string& url )
+{
+	http::XmlResponse xrsp ;
+	http::ResponseLog log( &xrsp ) ;
+	
+	if ( m_log.get() != 0 )
+		log.Reset(
+			(boost::format( "%1%-%2%." ) % m_log->prefix % m_log->sequence++).str(),
+			m_log->suffix, &xrsp ) ;
+	
+	http->Get( url, &log, auth ) ;
+	
+	m_root		= xrsp.Response() ;
+	m_entries	= m_root["entry"] ;
+}
+
 bool Feed::GetNext( http::Agent *http, const http::Header& auth )
 {
 	assert( http != 0 ) ;
@@ -62,12 +85,7 @@ bool Feed::GetNext( http::Agent *http, const http::Header& auth )
 	xml::NodeSet nss = m_root["link"].Find( "@rel", "next" ) ;
 	if ( !nss.empty() )
 	{
-		http::XmlResponse xrsp ;
-		http->Get( nss["@href"], &xrsp, auth ) ;
-		
-		m_root		= xrsp.Response() ;
-		m_entries	= m_root["entry"] ;
-		
+		Start( http, auth, nss["@href"] ) ;
 		return true ;
 	}
 	else
@@ -90,4 +108,17 @@ Feed::iterator::reference Feed::iterator::dereference() const
 	return Entry( *base_reference() ) ;
 }
 
+void Feed::EnableLog( const std::string& prefix, const std::string& suffix )
+{
+	m_log.reset( new LogInfo ) ;
+	m_log->prefix	= prefix ;
+	m_log->suffix	= suffix ;
+	m_log->sequence	= 0 ;
+}
+
+const xml::Node& Feed::Root() const
+{
+	return m_root ;
+}
+
 } // end of namespace
diff --git a/libgrive/src/drive/Feed.hh b/libgrive/src/drive/Feed.hh
index 321498c..f41fb7d 100644
--- a/libgrive/src/drive/Feed.hh
+++ b/libgrive/src/drive/Feed.hh
@@ -43,15 +43,29 @@ public :
 
 public :
 	explicit Feed( const xml::Node& root ) ;
+	Feed( ) ;
+	void Start( http::Agent *http, const http::Header& auth, const std::string& url ) ;
+	
 	void Assign( const xml::Node& root ) ;
+	const xml::Node& Root() const ;
 	
 	iterator begin() const ;
 	iterator end() const ;
 	
 	std::string Next() const ;
 	bool GetNext( http::Agent *http, const http::Header& auth ) ;
-		
+	
+	void EnableLog( const std::string& prefix, const std::string& suffix ) ;
+	
 private :
+	struct LogInfo
+	{
+		std::string	prefix ;
+		std::string	suffix ;
+		std::size_t	sequence ;
+	} ;
+	std::auto_ptr<LogInfo>	m_log ;
+
 	xml::Node		m_root ;
 	xml::NodeSet	m_entries ;
 } ;
diff --git a/libgrive/src/drive/Resource.cc b/libgrive/src/drive/Resource.cc
index a4e8501..4c7e813 100644
--- a/libgrive/src/drive/Resource.cc
+++ b/libgrive/src/drive/Resource.cc
@@ -259,7 +259,10 @@ void Resource::FromLocal( const DateTime& last_sync )
 		// remote_deleted first, it will be updated to sync/remote_changed
 		// in FromRemote()
 		else
+		{
+// 			Trace( "file %1% mtime %2%, last_sync %3%", path, m_mtime, last_sync ) ;
 			m_state = ( m_mtime > last_sync ? local_new : remote_deleted ) ;
+		}
 		
 		m_name		= Path2Str( path.filename() ) ;
 		m_kind		= fs::is_directory(path) ? "folder"	: "file" ;
diff --git a/libgrive/src/drive/State.cc b/libgrive/src/drive/State.cc
index dddb012..373e1b3 100644
--- a/libgrive/src/drive/State.cc
+++ b/libgrive/src/drive/State.cc
@@ -73,7 +73,6 @@ void State::FromLocal( const fs::path& p, gr::Resource* folder )
 	for ( fs::directory_iterator i( p ) ; i != fs::directory_iterator() ; ++i )
 	{
 		std::string fname = Path2Str(i->path().filename()) ;
-// Trace( "found file %1%", i->path() ) ;
 	
 		if ( IsIgnore(fname) )
 			Log( "file %1% is ignored by grive", fname, log::verbose ) ;
diff --git a/libgrive/src/http/ResponseLog.cc b/libgrive/src/http/ResponseLog.cc
index 0e7e631..8de81fe 100644
--- a/libgrive/src/http/ResponseLog.cc
+++ b/libgrive/src/http/ResponseLog.cc
@@ -29,14 +29,28 @@ ResponseLog::ResponseLog(
 	const std::string&	prefix,
 	const std::string&	suffix,
 	Receivable			*next ) :
-	m_log( Filename(prefix, suffix).c_str() ),
-	m_next( next )
+	m_enabled	( true ),
+	m_log		( Filename(prefix, suffix).c_str() ),
+	m_next		( next )
 {
+	assert( m_next != 0 ) ;
+}
+
+ResponseLog::ResponseLog( Receivable *next ) :
+	m_enabled	( false ),
+	m_next		( next )
+{
+	assert( m_next != 0 ) ;
 }
 
 std::size_t ResponseLog::OnData( void *data, std::size_t count )
 {
-	m_log.rdbuf()->sputn( reinterpret_cast<char*>(data), count ) ;
+	if ( m_enabled )
+	{
+		assert( m_log.rdbuf() != 0 ) ;
+		m_log.rdbuf()->sputn( reinterpret_cast<char*>(data), count ) ;
+	}
+	
 	return m_next->OnData( data, count ) ;
 }
 
@@ -51,4 +65,21 @@ std::string ResponseLog::Filename( const std::string& prefix, const std::string&
 	return prefix + DateTime::Now().Format( "%H%M%S" ) + suffix ;
 }
 
+void ResponseLog::Enable( bool enable )
+{
+	m_enabled = enable ;
+}
+
+void ResponseLog::Reset( const std::string& prefix, const std::string& suffix, Receivable *next )
+{
+	assert( next != 0 ) ;
+	
+	if ( m_log.is_open() )
+		m_log.close() ;
+	
+	m_log.open( Filename(prefix, suffix).c_str() ) ;
+	m_next		= next ;
+	m_enabled	= true ;
+}
+
 }} // end of namespace
diff --git a/libgrive/src/http/ResponseLog.hh b/libgrive/src/http/ResponseLog.hh
index a427324..9b7de65 100644
--- a/libgrive/src/http/ResponseLog.hh
+++ b/libgrive/src/http/ResponseLog.hh
@@ -33,14 +33,19 @@ public :
 		const std::string&	prefix,
 		const std::string&	suffix,
 		Receivable			*next ) ;
-
+	ResponseLog( Receivable	*next ) ;
+		
 	std::size_t OnData( void *data, std::size_t count ) ;
 	void Clear() ;
 
+	void Enable( bool enable = true ) ;
+	void Reset( const std::string& prefix, const std::string& suffix, Receivable *next ) ;
+	
 private :
 	static std::string Filename( const std::string& prefix, const std::string& suffix ) ;
 	
 private :
+	bool            m_enabled ;
 	std::ofstream	m_log ;
 	Receivable		*m_next ;
 } ;