When I checked out or updated from CVS, I got a "MalformedInputException". Before I found similar Bug.（URL is below）
http://jenkins.361315.n4.nabble.com/Exception-while-checking-out-from-CVS-td384310.html

console log:
[workspace] $ cvs -q -z3 update -PdC -r xx_0_0 -D "Thursday, April 28, 2011 10:18:56 AM UTC"
sun.io.MalformedInputException
at sun.io.ByteToCharUTF8.convert(ByteToCharUTF8.java:262)
at sun.nio.cs.StreamDecoder$ConverterSD.convertInto(StreamDecoder.java:316)
at sun.nio.cs.StreamDecoder$ConverterSD.implRead(StreamDecoder.java:366)
at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:252)
at java.io.InputStreamReader.read(InputStreamReader.java:212)
at java.io.BufferedReader.fill(BufferedReader.java:157)
at java.io.BufferedReader.readLine(BufferedReader.java:320)
at java.io.BufferedReader.readLine(BufferedReader.java:383)
at hudson.scm.CVSSCM.parseCVSEntries(CVSSCM.java:510)
at hudson.scm.CVSSCM.archive(CVSSCM.java:465)
at hudson.scm.CVSSCM.archive(CVSSCM.java:486)
at hudson.scm.CVSSCM.archive(CVSSCM.java:486)
at hudson.scm.CVSSCM.access$100(CVSSCM.java:123)
at hudson.scm.CVSSCM$1.invoke(CVSSCM.java:381)
at hudson.scm.CVSSCM$1.invoke(CVSSCM.java:374)
at hudson.FilePath.act(FilePath.java:757)
at hudson.FilePath.act(FilePath.java:739)
at hudson.scm.CVSSCM.checkout(CVSSCM.java:374)
at hudson.model.AbstractProject.checkout(AbstractProject.java:1174)
at hudson.model.AbstractBuild$AbstractRunner.checkout(AbstractBuild.java:523)
at hudson.model.AbstractBuild$AbstractRunner.run(AbstractBuild.java:418)
at hudson.model.Run.run(Run.java:1362)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:145)