Malformed component load rules when used with requestTeamBuild

I'm having problems using the team.scm.componentLoadRules property in conjunction with the requestTeamBuild ant task. What I'm doing is requesting a build through the GUI and making note of the team.scm.componentLoadRules property that gets set. I'm then calling requestTeamBuild on the same workspace and including the team.scm.componentLoadRules property in my overridePropertiesFile. Even using the exact same value for the property as RTC sets when launching by the GUI gives me the following exception:

 2013-06-24 13:14:43 [Jazz build engine] Fetching files to fetch destination "/test/jazz_build/jbe_lodi/jazz/buildsystem/buildengine/eclipse/build" ...
java.lang.IllegalArgumentException: Malformed component load rules property setting component\=_XgkEoO6DEd-oLaBM79QWuA fileitem\=_avQhINv5EeKz0IW_qfp8YQ
	at com.ibm.team.build.internal.scm.ComponentLoadRules.<init>(ComponentLoadRules.java:78)
	at com.ibm.team.build.internal.engine.JazzScmPreBuildParticipant.preBuild(JazzScmPreBuildParticipant.java:235)
	at com.ibm.team.build.internal.engine.BuildLoop.invokePreBuildParticipants(BuildLoop.java:845)
	at com.ibm.team.build.internal.engine.BuildLoop$2.run(BuildLoop.java:651)
	at java.lang.Thread.run(Thread.java:736)