diff -aurp -x '*.o' qt-everywhere-opensource-src-4.6.2-old/src/corelib/io/qfsfileengine.cpp qt-everywhere-opensource-src-4.6.2/src/corelib/io/qfsfileengine.cpp
--- qt-everywhere-opensource-src-4.6.2-old/src/corelib/io/qfsfileengine.cpp	2010-02-11 16:55:23.000000000 +0100
+++ qt-everywhere-opensource-src-4.6.2/src/corelib/io/qfsfileengine.cpp	2010-02-19 14:57:06.000000000 +0100
@@ -145,10 +145,9 @@ QString QFSFileEnginePrivate::canonicali
 #endif
     // Mac OS X 10.5.x doesn't support the realpath(X,0) extenstion we use here.
 #if defined(Q_OS_LINUX) || defined(Q_OS_SYMBIAN)
-    char *ret = realpath(path.toLocal8Bit().constData(), (char*)0);
-    if (ret) {
+    char ret[PATH_MAX];
+    if (realpath(path.toLocal8Bit().constData(), ret)) {
         QString canonicalPath = QDir::cleanPath(QString::fromLocal8Bit(ret));
-        free(ret);
         return canonicalPath;
     }
 #endif