diff --git a/src/lib/client/ServerProxy.cpp b/src/lib/client/ServerProxy.cpp
index 07ab771b..9be6e670 100644
--- a/src/lib/client/ServerProxy.cpp
+++ b/src/lib/client/ServerProxy.cpp
@@ -564,6 +564,12 @@ ServerProxy::setClipboard()
 		Clipboard clipboard;
 		clipboard.unmarshall(dataCached, 0);
 		m_client->setClipboard(id, &clipboard);
+
+		LOG((CLOG_NOTIFY "Clipboard Transmission Complete: Clipboard is updated."));
+	}
+	else if (r == kStart) {
+		size_t size = ClipboardChunk::getExpectedSize();
+		LOG((CLOG_NOTIFY "Clipboard Transmission Started: Start receiving %u bytes of clipboard data", size));
 	}
 }
 
diff --git a/src/lib/server/ClientProxy1_6.cpp b/src/lib/server/ClientProxy1_6.cpp
index 8b429cca..08bd9b90 100644
--- a/src/lib/server/ClientProxy1_6.cpp
+++ b/src/lib/server/ClientProxy1_6.cpp
@@ -91,6 +91,11 @@ ClientProxy1_6::recvClipboard()
 		info->m_sequenceNumber = seq;
 		m_events->addEvent(Event(m_events->forClipboard().clipboardChanged(),
 								 getEventTarget(), info));
+		LOG((CLOG_NOTIFY "Clipboard Transmission Complete: Clipboard is updated"));
+	}
+	else if (r == kStart) {
+		size_t size = ClipboardChunk::getExpectedSize();
+		LOG((CLOG_NOTIFY "Clipboard Transmission Started: Start receiving %u bytes of clipboard data", size));
 	}
 
 	return true;
diff --git a/src/lib/server/Server.cpp b/src/lib/server/Server.cpp
index 5c56adb3..6942e356 100644
--- a/src/lib/server/Server.cpp
+++ b/src/lib/server/Server.cpp
@@ -1521,6 +1521,7 @@ Server::onClipboardChanged(BaseClientProxy* sender,
 	// ignore update if sequence number is old
 	if (seqNum < clipboard.m_clipboardSeqNum) {
 		LOG((CLOG_INFO "ignored screen \"%s\" update of clipboard %d (missequenced)", getName(sender).c_str(), id));
+		LOG((CLOG_NOTIFY "Clipboard Transmission Ignored: Sequence number is old."));
 		return;
 	}
 
@@ -1534,6 +1535,7 @@ Server::onClipboardChanged(BaseClientProxy* sender,
 	String data = clipboard.m_clipboard.marshall();
 	if (data == clipboard.m_clipboardData) {
 		LOG((CLOG_DEBUG "ignored screen \"%s\" update of clipboard %d (unchanged)", clipboard.m_clipboardOwner.c_str(), id));
+		LOG((CLOG_NOTIFY "Clipboard Transmission Ignored: Clipboard data hasn't changed."));
 		return;
 	}
 
diff --git a/src/lib/synergy/ClipboardChunk.cpp b/src/lib/synergy/ClipboardChunk.cpp
index 0a0cc5c6..8b124d6b 100644
--- a/src/lib/synergy/ClipboardChunk.cpp
+++ b/src/lib/synergy/ClipboardChunk.cpp
@@ -22,6 +22,8 @@
 #include "io/IStream.h"
 #include "base/Log.h"
 
+size_t ClipboardChunk::s_expectedSize = 0;
+
 ClipboardChunk::ClipboardChunk(size_t size) :
 	Chunk(size)
 {
@@ -89,7 +91,6 @@ ClipboardChunk::assemble(synergy::IStream* stream,
 					ClipboardID& id,
 					UInt32& sequence)
 {
-	static size_t expectedSize;
 	UInt8 mark;
 	String data;
 
@@ -98,7 +99,7 @@ ClipboardChunk::assemble(synergy::IStream* stream,
 	}
 	
 	if (mark == kDataStart) {
-		expectedSize = synergy::string::stringToSizeType(data);
+		s_expectedSize = synergy::string::stringToSizeType(data);
 		LOG((CLOG_DEBUG "start receiving clipboard data"));
 		dataCached.clear();
 		return kNotFinish;
@@ -112,8 +113,8 @@ ClipboardChunk::assemble(synergy::IStream* stream,
 		if (id >= kClipboardEnd) {
 			return kError;
 		}
-		else if (expectedSize != dataCached.size()) {
-			LOG((CLOG_ERR "corrupted clipboard data, expected size=%d actual size=%d", expectedSize, dataCached.size()));
+		else if (s_expectedSize != dataCached.size()) {
+			LOG((CLOG_ERR "corrupted clipboard data, expected size=%d actual size=%d", s_expectedSize, dataCached.size()));
 			return kError;
 		}
 		return kFinish;
diff --git a/src/lib/synergy/ClipboardChunk.h b/src/lib/synergy/ClipboardChunk.h
index 3715b941..459f28b2 100644
--- a/src/lib/synergy/ClipboardChunk.h
+++ b/src/lib/synergy/ClipboardChunk.h
@@ -52,4 +52,9 @@ public:
 							UInt32& sequence);
 
 	static void			send(synergy::IStream* stream, void* data);
+
+	static size_t		getExpectedSize() { return s_expectedSize; }
+
+private:
+	static size_t		s_expectedSize;
 };
diff --git a/src/lib/synergy/StreamChunker.cpp b/src/lib/synergy/StreamChunker.cpp
index 46230ccd..c4c70f4b 100644
--- a/src/lib/synergy/StreamChunker.cpp
+++ b/src/lib/synergy/StreamChunker.cpp
@@ -78,6 +78,7 @@ StreamChunker::sendFile(
 	while (true) {
 		if (s_interruptFile) {
 			s_interruptFile = false;
+			LOG((CLOG_NOTIFY "File Transmission Interrupted: The previous file transmission is interrupted."));
 			break;
 		}
 		
@@ -142,6 +143,7 @@ StreamChunker::sendClipboard(
 	while (true) {
 		if (s_interruptClipboard) {
 			s_interruptClipboard = false;
+			LOG((CLOG_NOTIFY "Clipboard Transmission Interrupted: The previous clipboard transmission is interrupted."));
 			break;
 		}