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-rw-r--r--src/com/vaadin/terminal/gwt/client/ui/VWindow.java3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/com/vaadin/terminal/gwt/client/ui/VWindow.java b/src/com/vaadin/terminal/gwt/client/ui/VWindow.java
index 4957ce2b2d..90d31698ed 100644
--- a/src/com/vaadin/terminal/gwt/client/ui/VWindow.java
+++ b/src/com/vaadin/terminal/gwt/client/ui/VWindow.java
@@ -628,6 +628,9 @@ public class VWindow extends VOverlay implements Container, ScrollListener {
@Override
public void setPopupPosition(int left, int top) {
+ if (top < 0) {
+ top = 0;
+ }
super.setPopupPosition(left, top);
if (left != uidlPositionX && client != null) {
client.updateVariable(id, "positionx", left, false);