Connection URL Parse Error

When setting properties on the connection URL for my MySQL data source on AS 7 Beta 2, like the following:

jdbc:mysql://localhost:3306/EJB3?rewriteBatchStatements=true&maintainTimeStats=false

I get the following error:

08:43:48,778 ERROR [org.jboss.msc.service.fail] MSC00001: Failed to start service jboss.as.server-controller: org.jboss.msc.service.StartException in service jboss.as.server-controller: org.jboss.as.controller.persistence.ConfigurationPersistenceException: Failed to parse configuration
at org.jboss.as.server.ServerControllerService.start(ServerControllerService.java:146)
at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1344)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) [:1.6.0_20]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) [:1.6.0_20]
at java.lang.Thread.run(Thread.java:636) [:1.6.0_20]
Caused by: org.jboss.as.controller.persistence.ConfigurationPersistenceException: Failed to parse configuration
at org.jboss.as.controller.persistence.XmlConfigurationPersister.load(XmlConfigurationPersister.java:120)
at org.jboss.as.server.ServerControllerService.start(ServerControllerService.java:144)
... 4 more
Caused by: javax.xml.stream.XMLStreamException: com.ctc.wstx.exc.WstxUnexpectedCharException: Unexpected character '=' (code 61); expected a semi-colon after the reference for entity 'maintainTimeStats'
at [row,col

]: [118,103]

It's expecting a semi-colon for some reason, but the = is the correct syntax.