Cron triggers that specify multiples (entries with commas) get interpreted as arrays of Strings

Cron triggers of the form '0 0 14,20 * * ?' don't seem to work at the moment. They get returned by the UI as [[0 0 14, 20 * * ?]] and don't seem to trigger at all. (See the JDK1.4 and JDK1.5 builds on jbac for an example).