diff --git a/frontend-js/src/main/js/map/canvas/Point.js b/frontend-js/src/main/js/map/canvas/Point.js
index ae53c3343776760b0b4fd26e9809bec824d4ff5d..5d382661af887724b11bc53ea262b2524c9085d0 100644
--- a/frontend-js/src/main/js/map/canvas/Point.js
+++ b/frontend-js/src/main/js/map/canvas/Point.js
@@ -22,4 +22,12 @@ function Point(x, y) {
   }
 }
 
+/**
+ *
+ * @returns {string}
+ */
+Point.prototype.toString = function () {
+  return "[" + this.x + ", " + this.y + "]";
+};
+
 module.exports = Point;
diff --git a/frontend-js/src/test/js/map/canvas/Point-test.js b/frontend-js/src/test/js/map/canvas/Point-test.js
index bcc946c1c81c0000db065072aa7c56d2200088cb..16da526d4eec5381fd92b33c906755d23b712362 100644
--- a/frontend-js/src/test/js/map/canvas/Point-test.js
+++ b/frontend-js/src/test/js/map/canvas/Point-test.js
@@ -29,4 +29,10 @@ describe('Point', function () {
     });
   });
 
+  it("toString", function () {
+    var point = new Point(12, 3);
+    assert.ok(point.toString().indexOf("12")>=0);
+    assert.ok(point.toString().indexOf("3")>=0);
+  });
+
 });
diff --git a/service/src/main/java/lcsb/mapviewer/services/overlay/IconManager.java b/service/src/main/java/lcsb/mapviewer/services/overlay/IconManager.java
index ed82eb5dffc3379761fc442722d45a0a9e3de6cf..2d460d1dc07a6e256cf8e34ef7f50ad9b3379d6f 100644
--- a/service/src/main/java/lcsb/mapviewer/services/overlay/IconManager.java
+++ b/service/src/main/java/lcsb/mapviewer/services/overlay/IconManager.java
@@ -2,6 +2,8 @@ package lcsb.mapviewer.services.overlay;
 
 import org.apache.commons.lang3.mutable.MutableInt;
 
+import lcsb.mapviewer.common.Configuration;
+
 /**
  * This class return links to icons used by the client. It might be good idea to
  * move part of the functionality to client side as server shouldn't decide
@@ -137,6 +139,6 @@ public final class IconManager {
 	 * @return path to comment icon
 	 */
 	public String getCommentIcon() {
-		return "icons/comment.png";
+		return "icons/comment.png?v="+Configuration.getSystemBuildVersion(null);
 	}
 }
diff --git a/web/src/main/webapp/resources/images/icons/comment.png b/web/src/main/webapp/resources/images/icons/comment.png
index e4efd5829ccbe225c036634b5452e1c49457595b..0a3dcbd8a15409fe8cac92b25ef63cfd255a3916 100644
Binary files a/web/src/main/webapp/resources/images/icons/comment.png and b/web/src/main/webapp/resources/images/icons/comment.png differ