Index: trunk/psModules/src/imcombine/pmSubtractionKernels.c
===================================================================
--- trunk/psModules/src/imcombine/pmSubtractionKernels.c	(revision 25101)
+++ trunk/psModules/src/imcombine/pmSubtractionKernels.c	(revision 25120)
@@ -774,5 +774,5 @@
 
     out->type = in->type;
-    out->description = in->description;
+    out->description = psMemIncrRefCounter(in->description);
     out->num = in->num;
     out->u = psMemIncrRefCounter(in->u);