Regression with build parameters in XML API

The structure of runtime build parameters in the XML API for builds has changed in 1.652

Retrieving XML for a job using /job/JobName/api/xml?depth=2

In 1.651 the parameters are returned in the following structure:

<build>
<action>
<parameter>
<name>PARAM_NAME</name>
<value>paramvalue</value>
</parameter>
</action>

In 1.652 (and 1.653) the parameters are returned in the following structure:

<build>
<action>
<name>PARAM_NAME</name>
<value>paramvalue</value>
</action>

The <parameter> part of the output has disappeared. I do not see any reference to this in the changelog so I assume this is a regression and not an intentional change.