diff --git a/dialogs/kpColorSimilarityDialog.cpp b/dialogs/kpColorSimilarityDialog.cpp
--- a/dialogs/kpColorSimilarityDialog.cpp
+++ b/dialogs/kpColorSimilarityDialog.cpp
@@ -77,7 +77,7 @@
         baseWidget);
 
     m_colorSimilarityInput = new kpIntNumInput (inputGroupBox);
-    m_colorSimilarityInput->setRange (0, int (kpColorSimilarityHolder::MaxColorSimilarity * 100 + .1/*don't floor below target int*/),
+    m_colorSimilarityInput->setRange (0, int (kpColorSimilarityHolder::MaxColorSimilarity * 100 + 0.1/*don't floor below target int*/),
                                       5/*step*/);
     m_colorSimilarityInput->setSuffix (i18n ("%"));
     m_colorSimilarityInput->setSpecialValueText (i18n ("Exact Match"));
diff --git a/imagelib/effects/kpEffectBlurSharpen.cpp b/imagelib/effects/kpEffectBlurSharpen.cpp
--- a/imagelib/effects/kpEffectBlurSharpen.cpp
+++ b/imagelib/effects/kpEffectBlurSharpen.cpp
@@ -102,14 +102,14 @@
     //
     // I still have no idea what "radius" and "sigma" mean.
 
-    const double RadiusMin = .1;
+    const double RadiusMin = 0.1;
     const double RadiusMax = 2.5;
     const double radius = RadiusMin +
        (strength - 1) *
        (RadiusMax - RadiusMin) /
        (kpEffectBlurSharpen::MaxStrength - 1);
 
-    const double SigmaMin = .5;
+    const double SigmaMin = 0.5;
     const double SigmaMax = 3.0;
     const double sigma = SigmaMin +
         (strength - 1) *
@@ -128,7 +128,7 @@
 #if 0
     const double radius = 0/*auto-calculate*/;
 
-    const double SigmaMin = .6;
+    const double SigmaMin = 0.6;
     const double SigmaMax = 1.0;
     const double sigma = SigmaMin +
         (strength - 1) *
diff --git a/imagelib/kpDocumentMetaInfo.cpp b/imagelib/kpDocumentMetaInfo.cpp
--- a/imagelib/kpDocumentMetaInfo.cpp
+++ b/imagelib/kpDocumentMetaInfo.cpp
@@ -47,7 +47,7 @@
 
 // (round up to guarantee at least 1 dot per inch)
 const int kpDocumentMetaInfo::MinDotsPerMeter =
-    int (ceil (1/*single dot per inch - a very low DPI*/ * KP_INCHES_PER_METER) + .1);
+    int (ceil (1/*single dot per inch - a very low DPI*/ * KP_INCHES_PER_METER) + 0.1);
 
 const int kpDocumentMetaInfo::MaxDotsPerMeter =
     int ((600 * 100)/*a lot of DPI*/ * KP_INCHES_PER_METER);
diff --git a/widgets/colorSimilarity/kpColorSimilarityCubeRenderer.cpp b/widgets/colorSimilarity/kpColorSimilarityCubeRenderer.cpp
--- a/widgets/colorSimilarity/kpColorSimilarityCubeRenderer.cpp
+++ b/widgets/colorSimilarity/kpColorSimilarityCubeRenderer.cpp
@@ -51,7 +51,7 @@
 {
     int brightness = int (baseBrightness +
                           similarityDirection *
-                              .5 * colorSimilarity * kpColorSimilarityHolder::ColorCubeDiagonalDistance);
+                              0.5 * colorSimilarity * kpColorSimilarityHolder::ColorCubeDiagonalDistance);
 
     if (brightness < 0)
         brightness = 0;
diff --git a/widgets/colorSimilarity/kpColorSimilarityHolder.cpp b/widgets/colorSimilarity/kpColorSimilarityHolder.cpp
--- a/widgets/colorSimilarity/kpColorSimilarityHolder.cpp
+++ b/widgets/colorSimilarity/kpColorSimilarityHolder.cpp
@@ -50,7 +50,7 @@
     sqrt (255.0 * 255 * 3);
 
 // public static
-const double kpColorSimilarityHolder::MaxColorSimilarity = .30;
+const double kpColorSimilarityHolder::MaxColorSimilarity = 0.30;
 
 
 kpColorSimilarityHolder::kpColorSimilarityHolder ()
diff --git a/widgets/imagelib/effects/kpEffectHSVWidget.cpp b/widgets/imagelib/effects/kpEffectHSVWidget.cpp
--- a/widgets/imagelib/effects/kpEffectHSVWidget.cpp
+++ b/widgets/imagelib/effects/kpEffectHSVWidget.cpp
@@ -53,10 +53,10 @@
     m_hueInput->setRange (-180, 180, 15/*step*/);
 
     m_saturationInput = new kpDoubleNumInput (this);
-    m_saturationInput->setRange (-1, 1, .1/*step*/);
+    m_saturationInput->setRange (-1, 1, 0.1/*step*/);
 
     m_valueInput = new kpDoubleNumInput (this);
-    m_valueInput->setRange (-1, 1, .1/*step*/);
+    m_valueInput->setRange (-1, 1, 0.1/*step*/);
 
     hueLabel->setBuddy (m_hueInput);
     saturationLabel->setBuddy (m_saturationInput);
diff --git a/widgets/imagelib/effects/kpEffectToneEnhanceWidget.cpp b/widgets/imagelib/effects/kpEffectToneEnhanceWidget.cpp
--- a/widgets/imagelib/effects/kpEffectToneEnhanceWidget.cpp
+++ b/widgets/imagelib/effects/kpEffectToneEnhanceWidget.cpp
@@ -58,10 +58,10 @@
         QLabel *amountLabel = new QLabel (i18n ("&Amount:"), this);
 
         m_granularityInput = new kpDoubleNumInput (this);
-        m_granularityInput->setRange (0, 1, .1/*step*/);
+        m_granularityInput->setRange (0, 1, 0.1/*step*/);
 
         m_amountInput = new kpDoubleNumInput (this);
-        m_amountInput->setRange (0, 1, .1/*step*/);
+        m_amountInput->setRange (0, 1, 0.1/*step*/);
 
         granularityLabel->setBuddy (m_granularityInput);
         amountLabel->setBuddy (m_amountInput);