diff -r e24348a560a6 -r b72c6db6890b src/corelib/tools/qlocale.cpp
--- a/src/corelib/tools/qlocale.cpp	Fri Jun 11 14:24:45 2010 +0300
+++ b/src/corelib/tools/qlocale.cpp	Wed Jun 23 19:07:03 2010 +0300
@@ -170,16 +170,17 @@
 }
 
 // Assumes that code is a
-// QChar code[2];
+// QChar code[3];
 static QLocale::Country codeToCountry(const QChar *code)
 {
     ushort uc1 = code[0].unicode();
     ushort uc2 = code[1].unicode();
+    ushort uc3 = code[2].unicode();
 
     const unsigned char *c = country_code_list;
-    for (; *c != 0; c += 2) {
-        if (uc1 == c[0] && uc2 == c[1])
-            return QLocale::Country((c - country_code_list)/2);
+    for (; *c != 0; c += 3) {
+        if (uc1 == c[0] && uc2 == c[1] && uc3 == c[2])
+            return QLocale::Country((c - country_code_list)/3);
     }
 
     return QLocale::AnyCountry;
@@ -207,10 +208,15 @@
     if (country == QLocale::AnyCountry)
         return QString();
 
-    QString code(2, Qt::Uninitialized);
-    const unsigned char *c = country_code_list + 2*(uint(country));
+    const unsigned char *c = country_code_list + 3*(uint(country));
+
+    QString code(c[2] == 0 ? 2 : 3, Qt::Uninitialized);
+
     code[0] = ushort(c[0]);
     code[1] = ushort(c[1]);
+    if (c[2] != 0)
+        code[2] = ushort(c[2]);
+
     return code;
 }
 
@@ -246,7 +252,7 @@
 {
     for (int i = 0; i < 3; ++i)
         lang_begin[i] = 0;
-    for (int i = 0; i < 2; ++i)
+    for (int i = 0; i < 3; ++i)
         cntry_begin[i] = 0;
 
     int l = name.length();
@@ -277,7 +283,7 @@
                 break;
             case 1:
                 // parsing country
-                if (cntry - cntry_begin == 2) {
+                if (cntry - cntry_begin == 3) {
                     cntry_begin[0] = 0;
                     break;
                 }
@@ -301,7 +307,7 @@
     cntry = QLocale::AnyCountry;
 
     QChar lang_code[3];
-    QChar cntry_code[2];
+    QChar cntry_code[3];
     if (!splitLocaleName(name, lang_code, cntry_code))
         return;
 
@@ -419,7 +425,7 @@
     if (id == LOCALE_USER_DEFAULT) {
         result = envVarLocale();
         QChar lang[3];
-        QChar cntry[2];
+        QChar cntry[3];
         if ( result == "C" || (!result.isEmpty()
                 && splitLocaleName(QString::fromLocal8Bit(result), lang, cntry)) ) {
             long id = 0;
@@ -743,6 +749,7 @@
     char iso_name[6];
 };
 
+/* NOTE: This array should be sorted by the first column! */
 static const WindowsToISOListElt windows_to_iso_list[] = {
     { 0x0401, "ar_SA" },
     { 0x0402, "bg\0  " },
@@ -945,7 +952,7 @@
     QByteArray result = envVarLocale();
 
     QChar lang[3];
-    QChar cntry[2];
+    QChar cntry[3];
     if (result.isEmpty() || result != "C"
             && !splitLocaleName(QString::fromLocal8Bit(result), lang, cntry)) {
         QCFType<CFLocaleRef> l = CFLocaleCopyCurrent();
@@ -1215,7 +1222,7 @@
     case LanguageId:
     case CountryId: {
         QString preferredLanguage;
-        QString preferredCountry;
+        QString preferredCountry(3, QChar()); // codeToCountry assumes QChar[3]
         getMacPreferredLanguageAndCountry(&preferredLanguage, &preferredCountry);
         QLocale::Language languageCode = (preferredLanguage.isEmpty() ? QLocale::C : codeToLanguage(preferredLanguage.data()));
         QLocale::Country countryCode = (preferredCountry.isEmpty() ? QLocale::AnyCountry : codeToCountry(preferredCountry.data()));