If an Active Directory has a blank group name, then NPE's are thrown during the synchronization if using Oracle databases

If you have an AD group that has an empty name, then it works fine on all databases except Oracle- on Oracle you will get a NPE as shown here :-

2011-09-13 21:00:02,866 main FATAL [atlassian.jira.upgrade.PluginSystemLauncher] A fatal error occured during initialisation. JIRA has been locked.
java.lang.NullPointerException
at com.atlassian.crowd.embedded.ofbiz.OfBizInternalMembershipDao.fastAddUserMembershipToUserCache(OfBizInternalMembershipDao.java:392)
at com.atlassian.crowd.embedded.ofbiz.OfBizInternalMembershipDao.buildCache(OfBizInternalMembershipDao.java:335)
at com.atlassian.crowd.embedded.ofbiz.OfBizInternalMembershipDao.<init>(OfBizInternalMembershipDao.java:53)