Data being removed when a property is renamed

Steps to reproduce:

1. make a class and add a Number property named Test (with a capital T)
2. make another page, where you add the class you just created and set a value for Test
3. set the wiki code to view the object property
$doc.use("PropertyRenameTest")

• $doc.display("Test")
• $doc.display("test")
  4. rename the name of the property from Test to test (with a small t).
  5. the value will be lost

When you display the instance at step 3, you will see a value at the first list item. When you view the instance after step 4, you will see no value for either Test or test.