I get the following error (see below, where the server address is replaced by <<addrees>>).
The "work around" it to set the environment variable CATALINA_OPTS to -Dhudson.scm.CVSSCM.skipChangeLog=true,
but I prefer to have the problem fixed.

ERROR: cvs exited with error code 1
Command line was [Executing 'cvs' with arguments:
'-d:ssh:<<address>>:/cvsroot/test'
'log'
'-d'
'>=2010-04-19'

The ' characters around the executable and arguments are
not part of the command.
] in C:\project
Input text:
START==>null<==END
Working directory is C:/project
cvs exited with error code 1
Command line was [Executing 'cvs' with arguments:
'-d:ssh:<<address>>:/cvsroot/test'
'log'
'-d'
'>=2010-04-19'

The ' characters around the executable and arguments are
not part of the command.
] in C:\project
Input text:
START==>null<==END
at hudson.org.apache.tools.ant.taskdefs.AbstractCvsTask.runCommand(AbstractCvsTask.java:387)
at hudson.org.apache.tools.ant.taskdefs.AbstractCvsTask.execute(AbstractCvsTask.java:457)
at hudson.org.apache.tools.ant.taskdefs.cvslib.ChangeLogTask.execute(ChangeLogTask.java:293)
at hudson.scm.CVSSCM$4.invoke(CVSSCM.java:910)
at hudson.scm.CVSSCM$4.invoke(CVSSCM.java:839)
at hudson.FilePath.act(FilePath.java:747)
at hudson.FilePath.act(FilePath.java:729)
at hudson.scm.CVSSCM.calcChangeLog(CVSSCM.java:839)
at hudson.scm.CVSSCM.checkout(CVSSCM.java:408)
at hudson.model.AbstractProject.checkout(AbstractProject.java:1044)
at hudson.model.AbstractBuild$AbstractRunner.checkout(AbstractBuild.java:479)
at hudson.model.AbstractBuild$AbstractRunner.run(AbstractBuild.java:411)
at hudson.model.Run.run(Run.java:1244)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:122)
Recording test results
Finished: FAILURE