Index: trunk/ppStats/src/ppStatsFromMetadataStats.c
===================================================================
--- trunk/ppStats/src/ppStatsFromMetadataStats.c	(revision 19966)
+++ trunk/ppStats/src/ppStatsFromMetadataStats.c	(revision 19967)
@@ -18,5 +18,5 @@
         psStatsOptions option;
         if (!strcasecmp (entry->statistic, "RMS")) {
-            option = psStatsOptionFromString ("ROBUST_STDEV");
+            option = psStatsOptionFromString ("ROBUST_MEDIAN");
         } else if (!strcasecmp (entry->statistic, "SUM")) {
             option = psStatsOptionFromString ("SAMPLE_MEAN");
@@ -35,5 +35,5 @@
         double value;
         if (!strcasecmp (entry->statistic, "RMS")) {
-            value = stats->robustStdev;
+            value = sqrt(stats->robustMedian);
         } else if (!strcasecmp (entry->statistic, "SUM")) {
             value = stats->sampleMean * entry->vector->n;