--- /home/ce/pgadmin3-1.14.2/pgadmin/ctl/explainCanvas.cpp	2012-01-10 15:27:17.000000000 +0100
+++ explainCanvas.cpp	2012-05-05 12:30:05.745379339 +0200
@@ -323,10 +323,16 @@
 
 void ExplainPopup::SetShape(ExplainShape *s)
 {
+    wxSize popupSize;
+        
 	if (explainText)
 		delete explainText;
 	explainText = new ExplainText(this, s);
-	SetSize(explainText->GetSize());
+    
+    popupSize = explainText->GetSize();
+    popupSize.DecTo(wxGetDisplaySize());
+    
+    SetSize(popupSize);
 }