I recently upgraded my Jenkins from 1.543 to Jenkins 2.1 and Subversion Tagging Plugin automatically got upgraded from 1.17 to 1.18. However the SVN tagging fails with below exception, I reverted the plugin back to old version 1.17 and it works well with Jenkins 2.1.

Starting to tag
ERROR: Step ‘Perform Subversion tagging on successful build’ aborted due to exception:
java.lang.NoSuchMethodError: hudson.scm.SubversionSCM.getRevisionFile(Lhudson/model/Run;)Ljava/io/File;
at hudson.plugins.svn_tag.SvnTagPlugin.parseRevisionFile(SvnTagPlugin.java:243)
at hudson.plugins.svn_tag.SvnTagPlugin.perform(SvnTagPlugin.java:99)
at hudson.plugins.svn_tag.SvnTagPublisher.perform(SvnTagPublisher.java:79)
at hudson.tasks.BuildStepMonitor$3.perform(BuildStepMonitor.java:45)
at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:782)
at hudson.model.AbstractBuild$AbstractBuildExecution.performAllBuildSteps(AbstractBuild.java:723)
at hudson.model.Build$BuildExecution.cleanUp(Build.java:195)
at hudson.model.Run.execute(Run.java:1785)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
at hudson.model.ResourceController.execute(ResourceController.java:98)
at hudson.model.Executor.run(Executor.java:410)
No emails were triggered.
Finished: SUCCESS