Index: src/ictranslate/ICTranslateDlg.cpp
===================================================================
diff -u -raa9c75acee79827e5a305ab76af0b121fcbf860d -rf6fe924675e9de6120b6c1eac2430fa5b2946251
--- src/ictranslate/ICTranslateDlg.cpp	(.../ICTranslateDlg.cpp)	(revision aa9c75acee79827e5a305ab76af0b121fcbf860d)
+++ src/ictranslate/ICTranslateDlg.cpp	(.../ICTranslateDlg.cpp)	(revision f6fe924675e9de6120b6c1eac2430fa5b2946251)
@@ -15,6 +15,7 @@
 #define IMAGE_NONEXISTENT 1
 #define IMAGE_OVERFLUOUS 2
 #define IMAGE_VALID 3
+#define IMAGE_WARNING 4
 
 // CAboutDlg dialog used for App About
 
@@ -136,6 +137,7 @@
 	m_ilImages.Add(AfxGetApp()->LoadIcon(IDI_NONEXISTENT_ICON));
 	m_ilImages.Add(AfxGetApp()->LoadIcon(IDI_OVERFLUOUS_ICON));
 	m_ilImages.Add(AfxGetApp()->LoadIcon(IDI_VALID_ICON));
+	m_ilImages.Add(AfxGetApp()->LoadIcon(IDI_WARNING_ICON));
 
 	m_ctlCustomLanguageList.SetImageList(&m_ilImages, LVSIL_SMALL);
 
@@ -462,10 +464,22 @@
 	{
 		if(pBaseItem)
 		{
-			if(pCustomItem->GetChecksum() != pBaseItem->GetChecksum())
-				lvi.iImage = IMAGE_INVALID;
-			else
+			ictranslate::CTranslationItem::ECompareResult eResult = pCustomItem->Compare(*pBaseItem);
+			switch(eResult)
+			{
+			case ictranslate::CTranslationItem::eResult_Valid:
 				lvi.iImage = IMAGE_VALID;
+				break;
+			case ictranslate::CTranslationItem::eResult_Invalid:
+				lvi.iImage = IMAGE_INVALID;
+				break;
+			case ictranslate::CTranslationItem::eResult_ContentWarning:
+				lvi.iImage = IMAGE_WARNING;
+				break;
+			default:
+				assert(false);
+				lvi.iImage = IMAGE_INVALID;
+			}
 		}
 		else
 			lvi.iImage = IMAGE_OVERFLUOUS;
Index: src/ictranslate/ictranslate.rc
===================================================================
diff -u -r5f47ed98830ad078df4e4b685af13c86a6213678 -rf6fe924675e9de6120b6c1eac2430fa5b2946251
--- src/ictranslate/ictranslate.rc	(.../ictranslate.rc)	(revision 5f47ed98830ad078df4e4b685af13c86a6213678)
+++ src/ictranslate/ictranslate.rc	(.../ictranslate.rc)	(revision f6fe924675e9de6120b6c1eac2430fa5b2946251)
@@ -75,6 +75,7 @@
 IDI_VALID_ICON          ICON                    "res\\icon_valid.ico"
 IDI_INVALID_ICON        ICON                    "res\\icon_invalid.ico"
 IDI_OVERFLUOUS_ICON     ICON                    "res\\icon_overfluous.ico"
+IDI_WARNING_ICON        ICON                    "res\\icon_warning.ico"
 
 /////////////////////////////////////////////////////////////////////////////
 //
Index: src/ictranslate/ictranslate.vc90.vcproj
===================================================================
diff -u -r2ffaff594233ce671e00b842c718cca32f9498c5 -rf6fe924675e9de6120b6c1eac2430fa5b2946251
--- src/ictranslate/ictranslate.vc90.vcproj	(.../ictranslate.vc90.vcproj)	(revision 2ffaff594233ce671e00b842c718cca32f9498c5)
+++ src/ictranslate/ictranslate.vc90.vcproj	(.../ictranslate.vc90.vcproj)	(revision f6fe924675e9de6120b6c1eac2430fa5b2946251)
@@ -427,6 +427,10 @@
 			UniqueIdentifier="{67DA6AB6-F800-4c08-8B7A-83BB121AAD01}"
 			>
 			<File
+				RelativePath=".\res\icon1.ico"
+				>
+			</File>
+			<File
 				RelativePath=".\res\icon_invalid.ico"
 				>
 			</File>
@@ -443,6 +447,10 @@
 				>
 			</File>
 			<File
+				RelativePath=".\res\icon_warning.ico"
+				>
+			</File>
+			<File
 				RelativePath=".\res\ictranslate.ico"
 				>
 			</File>
Index: src/ictranslate/res/icon_warning.ico
===================================================================
diff -u
Binary files differ
Index: src/ictranslate/resource.h
===================================================================
diff -u -r2ffaff594233ce671e00b842c718cca32f9498c5 -rf6fe924675e9de6120b6c1eac2430fa5b2946251
--- src/ictranslate/resource.h	(.../resource.h)	(revision 2ffaff594233ce671e00b842c718cca32f9498c5)
+++ src/ictranslate/resource.h	(.../resource.h)	(revision f6fe924675e9de6120b6c1eac2430fa5b2946251)
@@ -12,6 +12,7 @@
 #define IDI_VALID_ICON                  131
 #define IDI_INVALID_ICON                132
 #define IDI_OVERFLUOUS_ICON             133
+#define IDI_WARNING_ICON                134
 #define IDC_DSTDATA_LIST                1000
 #define IDC_SRCDATA_LIST                1001
 #define IDC_SRCDATA_EDIT                1002
@@ -44,7 +45,7 @@
 // 
 #ifdef APSTUDIO_INVOKED
 #ifndef APSTUDIO_READONLY_SYMBOLS
-#define _APS_NEXT_RESOURCE_VALUE        134
+#define _APS_NEXT_RESOURCE_VALUE        135
 #define _APS_NEXT_COMMAND_VALUE         32779
 #define _APS_NEXT_CONTROL_VALUE         1026
 #define _APS_NEXT_SYMED_VALUE           101
Index: src/libictranslate/ResourceManager.cpp
===================================================================
diff -u -rc72f797f7e7795e3ff15dc2ed832032ee6bafd0a -rf6fe924675e9de6120b6c1eac2430fa5b2946251
--- src/libictranslate/ResourceManager.cpp	(.../ResourceManager.cpp)	(revision c72f797f7e7795e3ff15dc2ed832032ee6bafd0a)
+++ src/libictranslate/ResourceManager.cpp	(.../ResourceManager.cpp)	(revision f6fe924675e9de6120b6c1eac2430fa5b2946251)
@@ -150,6 +150,62 @@
 	*pszOut = _T('\0');
 }
 
+CTranslationItem::ECompareResult CTranslationItem::Compare(const CTranslationItem& rReferenceItem)
+{
+	if(!m_pszText || !rReferenceItem.m_pszText)
+		return eResult_Invalid;
+
+	if(rReferenceItem.m_uiChecksum != rReferenceItem.m_uiChecksum)
+		return eResult_Invalid;
+
+	// space check
+	if(rReferenceItem.m_pszText[0] == _t(' ') && m_pszText[0] != _t(' '))
+		return eResult_ContentWarning;
+	
+	size_t stReferenceLen = _tcslen(rReferenceItem.m_pszText);
+	size_t stOwnLen = _tcslen(m_pszText);
+	if(stReferenceLen > 0 && stOwnLen > 0 && rReferenceItem.m_pszText[stReferenceLen - 1] == _t(' ') && m_pszText[stOwnLen - 1] != _t(' '))
+		return eResult_ContentWarning;
+
+	// formatting strings check
+	tstring_t strRefFmt;
+	const tchar_t* pszData = rReferenceItem.m_pszText;
+	while((pszData = _tcschr(pszData, _t('%'))) != NULL)
+	{
+		pszData++;		// it works assuming the string is null-terminated
+		switch(*pszData)
+		{
+		case _t('%'):
+			pszData++;
+			break;		// it's a %% - skip it
+		default:
+			strRefFmt += *pszData;
+		}
+	}
+
+	tstring_t strOwnFmt;
+	pszData = m_pszText;
+	while((pszData = _tcschr(pszData, _t('%'))) != NULL)
+	{
+		pszData++;		// it works assuming the string is null-terminated
+		if(*pszData)
+		{
+			switch(*pszData)
+			{
+			case _t('%'):
+				pszData++;
+				break;		// it's a %% - skip it
+			default:
+				strOwnFmt += *pszData;
+			}
+		}
+	}
+	if(strRefFmt != strOwnFmt)
+		return eResult_ContentWarning;
+
+	return eResult_Valid;
+}
+
 CLangData::CLangData() :
 	m_pszFilename(NULL),
 	m_pszLngName(NULL),
Index: src/libictranslate/ResourceManager.h
===================================================================
diff -u -r1329b4d4f99ceb1f91f7feb915d58434721f4da7 -rf6fe924675e9de6120b6c1eac2430fa5b2946251
--- src/libictranslate/ResourceManager.h	(.../ResourceManager.h)	(revision 1329b4d4f99ceb1f91f7feb915d58434721f4da7)
+++ src/libictranslate/ResourceManager.h	(.../ResourceManager.h)	(revision f6fe924675e9de6120b6c1eac2430fa5b2946251)
@@ -44,6 +44,13 @@
 class LIBICTRANSLATE_API CTranslationItem
 {
 public:
+	enum ECompareResult
+	{
+		eResult_Valid,		// valid translation
+		eResult_Invalid,	// Invalid checksum or translation
+		eResult_ContentWarning	// the translation is suspicious
+	};
+public:
 	CTranslationItem();
 	CTranslationItem(const tchar_t* pszText, uint_t uiChecksum);
 	~CTranslationItem();
@@ -60,6 +67,8 @@
 
 	void UnescapeString();
 
+	ECompareResult Compare(const CTranslationItem& rReferenceItem);
+
 protected:
 	tchar_t* m_pszText;
 	size_t m_stTextLength;