Hudson version 1.227. Stand alone setup running on Winstone.

When attempting a tag after selecting 'Tag this build', the tag fails with an error:
Tagging http://subversion/svn/XXXXX/web/project/trunk (rev.19085) to
http://subversion/svn/XXXXX/web/project/tags/project-30

Failed to tag

org.tmatesoft.svn.core.SVNAuthenticationException: svn: Commit failed (details
follow):

svn: CHECKOUT of '/svn/XXXXX/!svn/ver/19211/web/project/tags': 403 Forbidden
(http://subversion)

at
org.tmatesoft.svn.core.internal.wc.SVNErrorManager.error(SVNErrorManager.java:84)

at org.tmatesoft.svn.core.wc.SVNCopyClient.doCopy(SVNCopyClient.java:354)

at
hudson.scm.SubversionTagAction$TagWorkerThread.perform(SubversionTagAction.java:167)

at hudson.model.TaskThread.run(TaskThread.java:77)

Completed

The error suggests the user setup within the hudson.scm.SubversionSCM.xml does
not have the authority to checkout the subversion tags directory revision.

Further investigation found the user being used for the tag is the user that
started Hudson in the first instance, and NOT the user declared in the
hudson.scm.SubversionSCM.xml file. Thus, if the user account that started Hudson
does not have enough permissions for SVN, then the tagging fails with the above
error.

Regards

Matt Gaunt