1 files changed, 5 insertions, 2 deletions
diff --git a/server/src/com/vaadin/ui/AbstractField.java b/server/src/com/vaadin/ui/AbstractField.java
index 59e986cd23..9cf72a36b3 100644
--- a/server/src/com/vaadin/ui/AbstractField.java
+++ b/server/src/com/vaadin/ui/AbstractField.java
@@ -1344,8 +1344,11 @@ public abstract class AbstractField<T> extends AbstractComponent implements
     }
 
     private void localeMightHaveChanged() {
-        if (!equals(valueLocale, getLocale())) {
-            Object modelValue = convertToModel(getValue(), valueLocale);
+        if (!equals(valueLocale, getLocale()) && dataSource != null
+                && !isBuffered() && !isModified()) {
+            // When we have a data source and the internal value is directly
+            // read from that we want to update the value
+            Object modelValue = convertToModel(getInternalValue(), valueLocale);
             setValue(convertFromModel(modelValue));
         }
     }