diff -u -w -p -r1.6 address.cxx
--- sc/source/core/tool/address.cxx	18 Oct 2006 12:21:36 -0000	1.6
+++ sc/source/core/tool/address.cxx	17 Nov 2006 17:12:41 -0000
@@ -156,7 +156,7 @@ lcl_XL_ParseSheetRef( const sal_Unicode 
 		while( 1 )
 		{
 			const sal_Unicode uc = *p;
-			if( CharClass::isAsciiAlpha( uc ) || uc == '_' )
+			if(  (uc < 128 ? CharClass::isAsciiAlpha( uc ) : ScGlobal::pCharClass->isLetter( uc )) || uc == '_' )
 			{
 				if( only_digits && p != start &&
 				   (uc == 'e' || uc == 'E' ) )