the verify() method in CellTable wasn't the problem; the element really seems to be missing in the central build; need to find out why

java/com.sap.sailing.selenium.test/src/com/sap/sailing/selenium/test/gwt/widgets/CellTable.java

@@ -69,10 +69,18 @@ public class CellTable extends PageObject {
 
             return rows;
         }
-
         return Collections.emptyList();
     }
 
+    @Override
+    protected void verify() {
+        // TODO: Verify that the context represents a GWT CellTable
+        String tagName = ((WebElement) this.context).getTagName();
+        if (!tagName.equalsIgnoreCase("table")) {
+            throw new IllegalArgumentException("WebElement does not represent a table");
+        }
+    }
+
     private List<WebElement> findHeaders() {
         return this.context.findElements(By.tagName("th"));
     }