diff --git a/public/java/src/org/broadinstitute/sting/gatk/walkers/variantrecalibration/VariantDataManager.java b/public/java/src/org/broadinstitute/sting/gatk/walkers/variantrecalibration/VariantDataManager.java
index 5f35c182c..ddeda1699 100755
--- a/public/java/src/org/broadinstitute/sting/gatk/walkers/variantrecalibration/VariantDataManager.java
+++ b/public/java/src/org/broadinstitute/sting/gatk/walkers/variantrecalibration/VariantDataManager.java
@@ -82,19 +82,11 @@ public class VariantDataManager {
             }
 
             foundZeroVarianceAnnotation = foundZeroVarianceAnnotation || (theSTD < 1E-6);
-            if( annotationKeys.get(iii).toLowerCase().contains("ranksum") ) { // BUGBUG: to clean up
-                for( final VariantDatum datum : data ) {
-                    if( datum.annotations[iii] > 0.0 ) { datum.annotations[iii] /= 3.0; }
-                }
-            }
             meanVector[iii] = theMean;
             varianceVector[iii] = theSTD;
             for( final VariantDatum datum : data ) {
+                // Transform each data point via: (x - mean) / standard deviation
                 datum.annotations[iii] = ( datum.isNull[iii] ? GenomeAnalysisEngine.getRandomGenerator().nextGaussian() : ( datum.annotations[iii] - theMean ) / theSTD );
-                // Each data point is now [ (x - mean) / standard deviation ]
-                if( annotationKeys.get(iii).toLowerCase().contains("ranksum") && datum.isNull[iii] && datum.annotations[iii] > 0.0 ) {
-                    datum.annotations[iii] /= 3.0;
-                }
             }
         }
         if( foundZeroVarianceAnnotation ) {
@@ -163,7 +155,7 @@ public class VariantDataManager {
         final int numBadSitesAdded = trainingData.size();
         logger.info( "Found " + numBadSitesAdded + " variants overlapping bad sites training tracks." );
 
-        // Next, sort the variants by the LOD coming from the positive model and add to the list the bottom X percent of variants
+        // Next sort the variants by the LOD coming from the positive model and add to the list the bottom X percent of variants
         Collections.sort( data );
         final int numToAdd = Math.max( minimumNumber - trainingData.size(), Math.round((float)bottomPercentage * data.size()) );
         if( numToAdd > data.size() ) {
@@ -241,23 +233,15 @@ public class VariantDataManager {
         double value;
 
         try {
-            if( annotationKey.equalsIgnoreCase("QUAL") ) {
-                value = vc.getPhredScaledQual();
-            } else if( annotationKey.equalsIgnoreCase("DP") ) {
-                value = Double.parseDouble( (String)vc.getAttribute( "DP" ) ) / Double.parseDouble( (String)vc.getAttribute( "AN" ) );
-            } else {
-                value = Double.parseDouble( (String)vc.getAttribute( annotationKey ) );
-                if( Double.isInfinite(value) ) { value = Double.NaN; }
-                if( annotationKey.equalsIgnoreCase("InbreedingCoeff") && value > 0.05 ) { value = Double.NaN; }
-                if( jitter && annotationKey.equalsIgnoreCase("HRUN") ) { // Integer valued annotations must be jittered a bit to work in this GMM
-                      value += -0.25 + 0.5 * GenomeAnalysisEngine.getRandomGenerator().nextDouble();
-                }
-                if( annotationKey.equalsIgnoreCase("HaplotypeScore") && MathUtils.compareDoubles(value, 0.0, 0.0001) == 0 ) { value = -0.2 + 0.4*GenomeAnalysisEngine.getRandomGenerator().nextDouble(); }
-                if( annotationKey.equalsIgnoreCase("FS") && MathUtils.compareDoubles(value, 0.0, 0.01) == 0 ) { value = -0.2 + 0.4*GenomeAnalysisEngine.getRandomGenerator().nextDouble(); }
+            value = Double.parseDouble( (String)vc.getAttribute( annotationKey ) );
+            if( Double.isInfinite(value) ) { value = Double.NaN; }
+            if( jitter && annotationKey.equalsIgnoreCase("HRUN") ) { // Integer valued annotations must be jittered a bit to work in this GMM
+                  value += -0.25 + 0.5 * GenomeAnalysisEngine.getRandomGenerator().nextDouble();
             }
-
+            if( jitter && annotationKey.equalsIgnoreCase("HaplotypeScore") && MathUtils.compareDoubles(value, 0.0, 0.0001) == 0 ) { value = -0.2 + 0.4*GenomeAnalysisEngine.getRandomGenerator().nextDouble(); }
+            if( jitter && annotationKey.equalsIgnoreCase("FS") && MathUtils.compareDoubles(value, 0.0, 0.001) == 0 ) { value = -0.2 + 0.4*GenomeAnalysisEngine.getRandomGenerator().nextDouble(); }
         } catch( Exception e ) {
-            value = Double.NaN; // The VQSR works with missing data now by marginalizing over the missing dimension when evaluating Gaussians
+            value = Double.NaN; // The VQSR works with missing data by marginalizing over the missing dimension when evaluating the Gaussian mixture model
         }
 
         return value;
diff --git a/public/java/src/org/broadinstitute/sting/gatk/walkers/variantrecalibration/VariantRecalibrator.java b/public/java/src/org/broadinstitute/sting/gatk/walkers/variantrecalibration/VariantRecalibrator.java
index 2c51f02d6..2d0355d7d 100755
--- a/public/java/src/org/broadinstitute/sting/gatk/walkers/variantrecalibration/VariantRecalibrator.java
+++ b/public/java/src/org/broadinstitute/sting/gatk/walkers/variantrecalibration/VariantRecalibrator.java
@@ -284,7 +284,7 @@ public class VariantRecalibrator extends RodWalker<ExpandingArrayList<VariantDat
             throw new UserException.CouldNotCreateOutputFile(RSCRIPT_FILE, "", e);
         }
 
-        // We make extensive use of the ggplot2 library: http://had.co.nz/ggplot2/
+        // We make extensive use of the ggplot2 R library: http://had.co.nz/ggplot2/
         stream.println("library(ggplot2)");
 
         createArrangeFunction( stream );
@@ -378,6 +378,7 @@ public class VariantRecalibrator extends RodWalker<ExpandingArrayList<VariantDat
         }
      }
 
+    // The Arrange function is how we place the 4 model plots on one page
     // from http://gettinggeneticsdone.blogspot.com/2010/03/arrange-multiple-ggplot2-plots-in-same.html
     private void createArrangeFunction( final PrintStream stream ) {
         stream.println("vp.layout <- function(x, y) viewport(layout.pos.row=x, layout.pos.col=y)");
@@ -402,5 +403,4 @@ public class VariantRecalibrator extends RodWalker<ExpandingArrayList<VariantDat
         stream.println("}");
         stream.println("}");
     }
-
- }
+}
diff --git a/public/java/src/org/broadinstitute/sting/gatk/walkers/variantrecalibration/VariantRecalibratorArgumentCollection.java b/public/java/src/org/broadinstitute/sting/gatk/walkers/variantrecalibration/VariantRecalibratorArgumentCollection.java
index f597fb128..e1a815913 100755
--- a/public/java/src/org/broadinstitute/sting/gatk/walkers/variantrecalibration/VariantRecalibratorArgumentCollection.java
+++ b/public/java/src/org/broadinstitute/sting/gatk/walkers/variantrecalibration/VariantRecalibratorArgumentCollection.java
@@ -60,7 +60,7 @@ public class VariantRecalibratorArgumentCollection {
     @Argument(fullName="priorCounts", shortName="priorCounts", doc="The number of prior counts to use in variational Bayes algorithm.", required=false)
     public double PRIOR_COUNTS = 20.0;
     @Argument(fullName="percentBadVariants", shortName="percentBad", doc="What percentage of the worst scoring variants to use when building the Gaussian mixture model of bad variants. 0.07 means bottom 7 percent.", required=false)
-    public double PERCENT_BAD_VARIANTS = 0.015;
+    public double PERCENT_BAD_VARIANTS = 0.03;
     @Argument(fullName="minNumBadVariants", shortName="minNumBad", doc="The minimum amount of worst scoring variants to use when building the Gaussian mixture model of bad variants. Will override -percentBad arugment if necessary.", required=false)
     public int MIN_NUM_BAD_VARIANTS = 2000;
 }