The logging noise in JDBC has been reduced significantly.
Added warning to the log if prepare yields errors.
The new 'propagateJtaTimeoutToXaResource' configuration property for JDBC and JMS now allows you to disable timeouts propagate via XA. For some vendor's XAResoure implementations this timeout seems to give problems and this property can serve as a workaround.
Vendor-specific flags for starting a new XA branch as well as joining/suspending/resuming/ending an existing branch are now supported on the JDBC and JMS connector classes.
The new property 'xaPropertyNamesToHide' allows you to specify what vendor-specific XA properties should be hidden in the log entries. Typically, this would be used for sensitive information like passwords.