I am getting the following exception when running my maven managed grails application via STS nightly (from today). Anyone else see this or know what might cause it?

Running script /Users/ryan/Apps/grails-1.1.1/scripts/RunApp.groovy
Environment set to development
groovy.lang.MissingMethodException: No signature of method: groovy.util.ConfigSlurper.parse() is applicable for argument types: (Config) values: [Config@33abb81e]
at _GrailsPackage_groovy$_run_closure1.doCall(_Grails Package_groovy:45)
at _GrailsPackage_groovy$_run_closure2_closure10.doCa ll(_GrailsPackage_groovy:87)
at _GrailsPackage_groovy$_run_closure2_closure10.doCa ll(_GrailsPackage_groovy)
at _GrailsSettings_groovy$_run_closure10.doCall(_Grai lsSettings_groovy:274)
at _GrailsSettings_groovy$_run_closure10.call(_Grails Settings_groovy)
at _GrailsPackage_groovy$_run_closure2.doCall(_Grails Package_groovy:86)
at RunApp$_run_closure1.doCall(RunApp.groovy:28)
at gant.Gant$_dispatch_closure4.doCall(Gant.groovy:32 4)
at gant.Gant$_dispatch_closure6.doCall(Gant.groovy:33 4)
at gant.Gant$_dispatch_closure6.doCall(Gant.groovy)
at gant.Gant.withBuildListeners(Gant.groovy:344)
at gant.Gant.this$2$withBuildListeners(Gant.groovy)
at gant.Gant$this$2$withBuildListeners.callCurrent(Un known Source)
at gant.Gant.dispatch(Gant.groovy:334)
at gant.Gant.this$2$dispatch(Gant.groovy)
at gant.Gant.invokeMethod(Gant.groovy)
at gant.Gant.processTargets(Gant.groovy:495)
at gant.Gant.processTargets(Gant.groovy:480)
at grails.util.GrailsMain.run(GrailsMain.groovy:31)
at grails.util.GrailsMain.main(GrailsMain.groovy)
Failed to compile configuration file: No signature of method: groovy.util.ConfigSlurper.parse() is applicable for argument types: (Config) values: [Config@33abb81e]