Steps to reproduce: 
1) Create a Web Test (called 'DataTableTest') with one comment step.

2) Create a built in data table with one column called 'Dummy' in this test.

3) Make sure that there is one record of data in the Data Table ('Dummy' can contain anything).

4) Create a second Web Test (called 'DriverTest')

5) Add one step (Test as Step) to invoke the 'DataTableTest' from the 'DriverTest'.

6) Create a Dynamic Test List

7) Specify the test list such that it contains only the test 'DriverTest'

8) Execute the Test List on a remote machine.  It should execute and the test will pass.

9) Modify the Data Table in the test 'DataTableTest', add a new column.

10) Change the name of the column to 'Loan No.' (note the period in the name, it doesn't matter where the period is).

11) Re-run the Test List remotely again.  

Expected behavior: the test will execute and pass

Actual behavior: It fails when it tries to execute the Test as Step 'DataTableTest'.