diff --git a/accessible/src/base/StyleInfo.cpp b/accessible/src/base/StyleInfo.cpp
index c5b255836bab..8e75cf5b0e68 100644
--- a/accessible/src/base/StyleInfo.cpp
+++ b/accessible/src/base/StyleInfo.cpp
@@ -47,7 +47,7 @@ StyleInfo::TextIndent(nsAString& aValue)
   const nsStyleCoord& styleCoord =
     mStyleContext->GetStyleText()->mTextIndent;
 
-  nscoord coordVal;
+  nscoord coordVal = 0;
   switch (styleCoord.GetUnit()) {
     case eStyleUnit_Coord:
       coordVal = styleCoord.GetCoordValue();
@@ -62,6 +62,20 @@ StyleInfo::TextIndent(nsAString& aValue)
                                            styleCoord.GetPercentValue());
       break;
     }
+
+    case eStyleUnit_Null:
+    case eStyleUnit_Normal:
+    case eStyleUnit_Auto:
+    case eStyleUnit_None:
+    case eStyleUnit_Factor:
+    case eStyleUnit_Degree:
+    case eStyleUnit_Grad:
+    case eStyleUnit_Radian:
+    case eStyleUnit_Turn:
+    case eStyleUnit_Integer:
+    case eStyleUnit_Enumerated:
+    case eStyleUnit_Calc:
+      break;
   }
 
   aValue.AppendFloat(nsPresContext::AppUnitsToFloatCSSPixels(coordVal));
diff --git a/accessible/src/base/TextAttrs.cpp b/accessible/src/base/TextAttrs.cpp
index d13c51dce0af..ad2ca35bb671 100644
--- a/accessible/src/base/TextAttrs.cpp
+++ b/accessible/src/base/TextAttrs.cpp
@@ -707,6 +707,9 @@ TextAttrsMgr::TextPosTextAttr::
       nsAccUtils::SetAccAttr(aAttributes, nsGkAtoms::textPosition,
                              NS_LITERAL_STRING("super"));
       break;
+
+    case eTextPosNone:
+      break;
   }
 }
 
@@ -754,6 +757,19 @@ TextAttrsMgr::TextPosTextAttr::
          eTextPosSuper :
          (coordValue < 0 ? eTextPosSub : eTextPosBaseline);
     }
+
+    case eStyleUnit_Null:
+    case eStyleUnit_Normal:
+    case eStyleUnit_Auto:
+    case eStyleUnit_None:
+    case eStyleUnit_Factor:
+    case eStyleUnit_Degree:
+    case eStyleUnit_Grad:
+    case eStyleUnit_Radian:
+    case eStyleUnit_Turn:
+    case eStyleUnit_Integer:
+    case eStyleUnit_Calc:
+      break;
   }
 
   const nsIContent* content = aFrame->GetContent();
diff --git a/accessible/src/html/HTMLTableAccessible.cpp b/accessible/src/html/HTMLTableAccessible.cpp
index 2f28bd1910f0..bda8d2041083 100644
--- a/accessible/src/html/HTMLTableAccessible.cpp
+++ b/accessible/src/html/HTMLTableAccessible.cpp
@@ -1401,7 +1401,8 @@ HTMLTableAccessible::IsProbablyLayoutTable()
   // Check for styled background color across rows (alternating background
   // color is a common feature for data tables).
   PRUint32 childCount = ChildCount();
-  nscolor rowColor, prevRowColor;
+  nscolor rowColor = 0;
+  nscolor prevRowColor;
   for (PRUint32 childIdx = 0; childIdx < childCount; childIdx++) {
     Accessible* child = GetChildAt(childIdx);
     if (child->Role() == roles::ROW) {