When trying to back up to a tar.gz archive using the Backup plugin, an error occurs. The output of the backup operation looks like this:

[ INFO] Backup started at [05/20/10 11:01:32]
[ INFO] Setting hudson in shutdown mode to avoid files corruptions.
[ INFO] Waiting all jobs end...
[ INFO] Number of running jobs detected : 0
[ INFO] All jobs finished.
[ INFO] Full backup file name : C:\Program Files\Hudson\Backup\backup_20100520_1101.tar.gz
[ERROR] org.codehaus.plexus.archiver.ArchiverException: Problem creating TAR: request to write '1372' bytes exceeds size in header of '91402' bytes
org.jvnet.hudson.plugins.backup.BackupException: java.io.IOException: org.codehaus.plexus.archiver.ArchiverException: Problem creating TAR: request to write '1372' bytes exceeds size in header of '91402' bytes
at org.jvnet.hudson.plugins.backup.utils.BackupEngine.doBackup(BackupEngine.java:115)
at org.jvnet.hudson.plugins.backup.utils.BackupTask.run(BackupTask.java:125)
at java.lang.Thread.run(Unknown Source)
Caused by: java.io.IOException: org.codehaus.plexus.archiver.ArchiverException: Problem creating TAR: request to write '1372' bytes exceeds size in header of '91402' bytes
at org.jvnet.hudson.plugins.backup.utils.BackupEngine.handleEnd(BackupEngine.java:104)
at org.apache.commons.io.DirectoryWalker.walk(DirectoryWalker.java:336)
at org.jvnet.hudson.plugins.backup.utils.BackupEngine.doBackup(BackupEngine.java:113)
... 2 more
[ INFO] Cancel hudson shutdown mode
[ INFO] Backup end at [05/20/10 11:01:38]
[ INFO] [6.052s]