EventLogger unreliable

The logger fails often with messages like:

15.07.2008 12:30:55 ERROR [org.hippoecm.repository.EventLogger.logEvent():143] Failed logging event: [admin -> Session.logout] : /hippo:log: the item cannot be saved because it has been modified externally.
15.07.2008 12:30:55 ERROR [org.hippoecm.repository.EventLogger.logEvent():143] Failed logging event: [anonymous -> Repository.login] : /hippo:log: the item cannot be saved because it has been modified externally.

There are probably more issues with the logging, like simultaneous loggin (node already exists) and performance issues with heavy load (should be tested).

Shouldn't the logger be asynchronous and log in a private session (root session)?