diff --git a/src/OpenFOAM/meshes/meshTools/mergePoints.C b/src/OpenFOAM/meshes/meshTools/mergePoints.C
index 041a6f8194..2fcb505673 100644
--- a/src/OpenFOAM/meshes/meshTools/mergePoints.C
+++ b/src/OpenFOAM/meshes/meshTools/mergePoints.C
@@ -95,8 +95,8 @@ Foam::label Foam::mergePoints
         sortedTol[sortI] =
             2*mergeTol*
             (
-                mag(scalar(pt.x() - compareOrigin.x())),
-              + mag(scalar(pt.y() - compareOrigin.y())),
+                mag(scalar(pt.x() - compareOrigin.x()))
+              + mag(scalar(pt.y() - compareOrigin.y()))
               + mag(scalar(pt.z() - compareOrigin.z()))
             );
     }
diff --git a/src/functionObjects/field/wallBoundedStreamLine/wallBoundedParticleTemplates.C b/src/functionObjects/field/wallBoundedStreamLine/wallBoundedParticleTemplates.C
index 731c4ad0b3..b2febe5203 100644
--- a/src/functionObjects/field/wallBoundedStreamLine/wallBoundedParticleTemplates.C
+++ b/src/functionObjects/field/wallBoundedStreamLine/wallBoundedParticleTemplates.C
@@ -232,6 +232,39 @@ Foam::scalar Foam::wallBoundedParticle::trackToEdge
         {
             // Negative tet volume. Track back by setting the end point
             projectedEndPosition = position() - (endPosition-position());
+
+            // Make sure to use a large enough vector to cross the negative
+            // face. Bit overkill.
+            const vector d(endPosition-position());
+            const scalar magD(mag(d));
+            if (magD > ROOTVSMALL)
+            {
+                // Get overall mesh bounding box
+                treeBoundBox meshBb(mesh_.bounds());
+                // Extend to make 3D
+                meshBb.inflate(ROOTSMALL);
+
+                // Create vector guaranteed to cross mesh bounds
+                projectedEndPosition = position()-meshBb.mag()*d/magD;
+
+                // Clip to mesh bounds
+                point intPt;
+                direction intPtBits;
+                bool ok = meshBb.intersects
+                (
+                    projectedEndPosition,
+                    position()-projectedEndPosition,
+                    projectedEndPosition,
+                    position(),
+                    intPt,
+                    intPtBits
+                );
+                if (ok)
+                {
+                    // Should always be the case
+                    projectedEndPosition = intPt;
+                }
+            }
         }
 
         // Remove normal component
diff --git a/src/meshTools/sets/cellSources/fieldToCell/fieldToCell.C b/src/meshTools/sets/cellSources/fieldToCell/fieldToCell.C
index 298996937c..b6640eaa03 100644
--- a/src/meshTools/sets/cellSources/fieldToCell/fieldToCell.C
+++ b/src/meshTools/sets/cellSources/fieldToCell/fieldToCell.C
@@ -190,7 +190,7 @@ void Foam::fieldToCell::applyToSet
         false
     );
 
-    // Note: should check for volScalarField but that introduces depencendy
+    // Note: should check for volScalarField but that introduces dependency
     //       on volMesh so just use another type with processor-local scope
     if (!fieldObject.typeHeaderOk<labelIOList>(false))
     {
@@ -198,6 +198,9 @@ void Foam::fieldToCell::applyToSet
             << "Cannot read field " << fieldName_
             << " from time " << mesh().time().timeName() << endl;
     }
+    // Note: should use volScalarField::typeName instead below
+    //       but that would introduce linkage problems (finiteVolume needs
+    //       meshTools)
     else if (fieldObject.headerClassName() == "volScalarField")
     {
         IFstream str(typeFilePath<labelIOList>(fieldObject));