Index: trunk/psModules/src/imcombine/pmStackReject.c
===================================================================
--- trunk/psModules/src/imcombine/pmStackReject.c	(revision 19349)
+++ trunk/psModules/src/imcombine/pmStackReject.c	(revision 19482)
@@ -295,7 +295,14 @@
     }
 
-    if (threaded) {
+    // Harvest the jobs
+    if (threaded) {
+        psThreadJob *job;                   // Job to destroy
+        while ((job = psThreadJobGetDone())) {
+            psFree(job);
+        }
+
         psMutexDestroy(source);
     }
+
     psFree(source);
     bad = psPixelsFromMask(bad, target, PM_STACK_MASK_ALL);