contentbylabel macro does not sort ASCII characters properly

Here are the following steps on how to reproduce this bug:

1. Pick any space and then create a page title of "Test Sorting German Umlaut" with the following content:

   {contentbylabel:label=umlaut}
   

2. Go to Space Admin and create a Space Label called umlaut
3. Under the page of "Test Sorting German Umlaut", create the following 3 pages:

• "T - Pagetitle beginning with T" and tag it with label umlaut
• "Ü - Pagetitle beginning with Ü" and tag it with label umlaut
• "V - Pagetitle beginning with V" and tag it with label umlaut

By viewing the page "Test Sorting German Umlaut", it's obvious that the macro represents the page "Ü - Pagetitle beginning with Ü" is appearing on top.

By right, the correct sorting for contentbylabel macro for the page "Ü - Pagetitle beginning with Ü" would be between "T - Pagetitle beginning with T" and "V - Pagetitle beginning with V". Please see screen shot attached:

This problem is affecting Confluence 3.2.1_01. However, this problem does not resurface in Confluence 3.3 and above.

Quickest Workaround

Upgrade Confluence to at least Confluence 3.3 to avoid from facing this problem.