ensure annotation isn't added twice - note - this could cause efficiency problems

diff --git a/src/jalview/datamodel/Sequence.java b/src/jalview/datamodel/Sequence.java
index cdb1921..293528d 100755 (executable)
--- a/src/jalview/datamodel/Sequence.java
+++ b/src/jalview/datamodel/Sequence.java
@@ -901,8 +901,10 @@ public class Sequence implements SequenceI
     {
       this.annotation = new Vector();
     }
-
-    this.annotation.addElement(annotation);
+    if (!this.annotation.contains(annotation))
+    {
+      this.annotation.addElement(annotation);
+    }
     annotation.setSequenceRef(this);
   }