Looks like a known bug, which has already been filed:
http://jira.openlaszlo.org/jira/browse/LPP-10260 or http://jira.openlaszlo.org/jira/browse/LPP-10217
http://jira.openlaszlo.org/jira/browse/LPP-10303, the JIRA issued you filed is probabably a duplicate of either LPP-10260 or LPP-10217.