In Beta 2, I wanted to test that connection properties were now properly handled, so I set the following two connection properties for my MySQL data source:

<connection-property name="rewriteBatchStatements">true</connection-property>
<connection-property name="maintainTimeStats">false</connection-property>

After starting up the server, and running a test, I noticed that my test results weren't what I was expecting, performance wise, but the error I was getting because of the value of the connection property being quoted, was not in the log. So the other issue was fixed, but this go around, I saw that both connection properties just disappeared from the standalone.xml.

No warning or error in the log either.