--- rpm-5.4.12/rpmio/rpmpython.c.rpmpythontrunc~	2013-08-09 03:05:39.809947086 +0200
+++ rpm-5.4.12/rpmio/rpmpython.c	2013-08-09 03:25:25.097372593 +0200
@@ -229,6 +229,8 @@ fprintf(stderr, "==> %s(%p,%s,%p)\n", __
 		if (sys_stdout != NULL && PycStringIO_OutputCheck(sys_stdout)) {
 		    PyObject * o = (*PycStringIO->cgetvalue)(sys_stdout);
 		    *resultp = (PyString_Check(o) ? PyString_AsString(o) : "");
+		    PyObject_CallMethod(sys_stdout, "seek", "i",0);
+		    PyObject_CallMethod(sys_stdout, "truncate", NULL);
 		} else
 		    *resultp = "";
 	    }