Index: src/wp/ap/unix/ap_UnixDialog_Latex.cpp
===================================================================
--- src/wp/ap/unix/ap_UnixDialog_Latex.cpp	(revision 23446)
+++ src/wp/ap/unix/ap_UnixDialog_Latex.cpp	(working copy)
@@ -97,10 +97,7 @@
 void AP_UnixDialog_Latex::event_Insert(void)
 {
 	getLatexFromGUI();
-	if (convertLatexToMathML())
-	{
 		insertIntoDoc();
-	}
 }
 
 void AP_UnixDialog_Latex::event_Close(void)
@@ -155,7 +152,7 @@
 	sz = gtk_text_buffer_get_text   (buffer,&startIter,&endIter,TRUE);
 	sLatex = sz;
 	g_free(sz);
-	UT_DEBUGMSG(("LAtex from widget is %s \n",sLatex.utf8_str()));
+	UT_DEBUGMSG(("Latex from widget is %s \n",sLatex.utf8_str()));
 	setLatex(sLatex);
 
 	return true;
Index: src/wp/ap/xp/ap_Dialog_Latex.h
===================================================================
--- src/wp/ap/xp/ap_Dialog_Latex.h	(revision 23446)
+++ src/wp/ap/xp/ap_Dialog_Latex.h	(working copy)
@@ -58,6 +58,9 @@
 private:
 	UT_UTF8String m_sLatex;
 	UT_UTF8String m_sMathML;
+	UT_UTF8String m_sBackupLatex;
+	void			_backupLatex(void)
+	{	m_sBackupLatex = m_sLatex;	}
 };
 
 #endif /* AP_DIALOG_LATEX_H */
Index: src/wp/ap/xp/ap_Dialog_Latex.cpp
===================================================================
--- src/wp/ap/xp/ap_Dialog_Latex.cpp	(revision 23446)
+++ src/wp/ap/xp/ap_Dialog_Latex.cpp	(working copy)
@@ -103,11 +103,17 @@
 void  AP_Dialog_Latex::fillLatex(UT_UTF8String & sLatex)
 {
         setLatex(sLatex);
+	_backupLatex();
 	setLatexInGUI();
 }
 
 void AP_Dialog_Latex::insertIntoDoc(void)
 {
+	if (m_sBackupLatex == m_sLatex)
+		return;
+	if (!convertLatexToMathML())
+		return;
+	_backupLatex();
 	XAP_Frame * pFrame = getActiveFrame();
 	FV_View * pView = static_cast<FV_View *>(pFrame->getCurrentView());
 	pView->cmdInsertLatexMath(m_sLatex,m_sMathML);
Index: src/wp/ap/win/ap_Win32Dialog_Latex.cpp
===================================================================
--- src/wp/ap/win/ap_Win32Dialog_Latex.cpp	(revision 23446)
+++ src/wp/ap/win/ap_Win32Dialog_Latex.cpp	(working copy)
@@ -79,10 +79,7 @@
 void AP_Win32Dialog_Latex::event_Insert(void)
 {
 	getLatexFromGUI();
-	if(convertLatexToMathML())
-	{
 		insertIntoDoc();
-	}
 }
 
 void AP_Win32Dialog_Latex::event_Close(void)