Compatibility problem between 'Page Approval Plugin' and 'New Code Macro Plugin'

We are using Atlassian Confluence 2.10.3 with the Page Approval Plugin version: 1.10.1

I've noticed a small problem with using the Page Approval Plugin with the following plugin:

New Code Macro Plugin
Vendor: Atlassian, Inc.
Plugin Version: 1.9.1

Using the example below:

{code:title=Bar.java|borderStyle=solid}
// Some comments here
public String getFoo()
{
return foo;
}
{code}

{code:xml}
<test>
<another />
</test>
{code}

This give me a page approval error saying that the "{return foo;}" macro is not compatible. Do you know why this may be?

Any help will be appreciated.

Regards,
Grant Durr