Index: _msi.c
===================================================================
--- _msi.c	(revision 57972)
+++ _msi.c	(working copy)
@@ -488,7 +536,7 @@
     FILETIME fval;
     char sbuf[1000];
     char *sval = sbuf;
-    DWORD ssize = sizeof(sval);
+    DWORD ssize = sizeof(sbuf);
 
     if (!PyArg_ParseTuple(args, "i:GetProperty", &field))
 	return NULL;
@@ -496,7 +544,8 @@
     status = MsiSummaryInfoGetProperty(si->h, field, &type, &ival, 
 	&fval, sval, &ssize);
     if (status == ERROR_MORE_DATA) {
-	sval = malloc(ssize);
+        ssize++;
+	    sval = malloc(ssize);
         status = MsiSummaryInfoGetProperty(si->h, field, &type, &ival, 
     	    &fval, sval, &ssize);
     }
@@ -508,7 +557,7 @@
 	    PyErr_SetString(PyExc_NotImplementedError, "FILETIME result");
 	    return NULL;
 	case VT_LPSTR:
-	    result = PyString_FromStringAndSize(sval, ssize);
+	    result = PyString_FromString(sval);
 	    if (sval != sbuf)
 		free(sval);
 	    return result;