This Bugzilla instance is a read-only archive of historic NetBeans bug reports. To report a bug in NetBeans please follow the project's instructions for reporting issues.
remove synchronization from XAM, make controlling access to this the responsibility of the client.
Between 6.1 and 6.5 some of it have been taken care of and so far xam/xdm looks much more stable. I do not recommend making changes, unless absolutely required.