I've configured three IRC channels on the main config page. That works pretty nice, the bot joined all three channels.

Now I want to setup the channel to use for each job. So if I enter a channel name on the job config page and hit Apply, I got the following error page:

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Status Code: 500

Exception: java.lang.RuntimeException: Failed to instantiate class hudson.scm.SubversionSCM from {"":["0","auto"],"excludedCommitMessages":"","excludedRegions":"","excludedRevprop":"","excludedUsers":"","includedRegions":"","locations":

{"local":".","remote":"<removed-long-url>"}

,"value":"2","workspaceUpdater":{"stapler-class":"hudson.plugins.im.build_notify.PrintFailingTestsBuildToChatNotifier"}}
Stacktrace:
javax.servlet.ServletException: java.lang.RuntimeException: Failed to instantiate class hudson.scm.SubversionSCM from {"":["0","auto"],"excludedCommitMessages":"","excludedRegions":"","excludedRevprop":"","excludedUsers":"","includedRegions":"","locations":

{"local":".","remote":"<removed-long-url>"}

,"value":"2","workspaceUpdater":{"stapler-class":"hudson.plugins.im.build_notify.PrintFailingTestsBuildToChatNotifier"}}
at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:616)
at org.kohsuke.stapler.Stapler.invoke(Stapler.java:659)
at org.kohsuke.stapler.MetaClass$6.doDispatch(MetaClass.java:241)
at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53)
at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:574)
at org.kohsuke.stapler.Stapler.invoke(Stapler.java:659)
at org.kohsuke.stapler.MetaClass$6.doDispatch(MetaClass.java:241)
at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53)
at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:574)
at org.kohsuke.stapler.Stapler.invoke(Stapler.java:659)
at org.kohsuke.stapler.Stapler.invoke(Stapler.java:488)
at org.kohsuke.stapler.Stapler.service(Stapler.java:162)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:45)
at winstone.ServletConfiguration.execute(ServletConfiguration.java:248)
at winstone.RequestDispatcher.forward(RequestDispatcher.java:333)
at winstone.RequestDispatcher.doFilter(RequestDispatcher.java:376)
at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:95)
at hudson.plugins.greenballs.GreenBallFilter.doFilter(GreenBallFilter.java:58)
at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:98)
at hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:87)
at winstone.FilterConfiguration.execute(FilterConfiguration.java:194)
at winstone.RequestDispatcher.doFilter(RequestDispatcher.java:366)
at hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:47)
at winstone.FilterConfiguration.execute(FilterConfiguration.java:194)
at winstone.RequestDispatcher.doFilter(RequestDispatcher.java:366)
at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:84)
at hudson.security.UnwrapSecurityExceptionFilter.doFilter(UnwrapSecurityExceptionFilter.java:51)
at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
at org.acegisecurity.ui.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:166)
at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
at org.acegisecurity.providers.anonymous.AnonymousProcessingFilter.doFilter(AnonymousProcessingFilter.java:125)
at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
at org.acegisecurity.ui.rememberme.RememberMeProcessingFilter.doFilter(RememberMeProcessingFilter.java:142)
at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
at org.acegisecurity.ui.AbstractProcessingFilter.doFilter(AbstractProcessingFilter.java:271)
at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
at org.acegisecurity.ui.basicauth.BasicProcessingFilter.doFilter(BasicProcessingFilter.java:173)
at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
at jenkins.security.ApiTokenFilter.doFilter(ApiTokenFilter.java:63)
at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
at org.acegisecurity.context.HttpSessionContextIntegrationFilter.doFilter(HttpSessionContextIntegrationFilter.java:249)
at hudson.security.HttpSessionContextIntegrationFilter2.doFilter(HttpSessionContextIntegrationFilter2.java:66)
at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
at hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.java:76)
at de.theit.jenkins.crowd.CrowdServletFilter.doFilter(CrowdServletFilter.java:195)
at hudson.security.HudsonFilter.doFilter(HudsonFilter.java:164)
at winstone.FilterConfiguration.execute(FilterConfiguration.java:194)
at winstone.RequestDispatcher.doFilter(RequestDispatcher.java:366)
at org.kohsuke.stapler.compression.CompressionFilter.doFilter(CompressionFilter.java:50)
at winstone.FilterConfiguration.execute(FilterConfiguration.java:194)
at winstone.RequestDispatcher.doFilter(RequestDispatcher.java:366)
at hudson.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:81)
at winstone.FilterConfiguration.execute(FilterConfiguration.java:194)
at winstone.RequestDispatcher.doFilter(RequestDispatcher.java:366)
at winstone.RequestDispatcher.forward(RequestDispatcher.java:331)
at winstone.RequestHandlerThread.processRequest(RequestHandlerThread.java:215)
at winstone.RequestHandlerThread.run(RequestHandlerThread.java:138)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at winstone.BoundedExecutorService$1.run(BoundedExecutorService.java:77)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
Caused by: java.lang.RuntimeException: Failed to instantiate class hudson.scm.SubversionSCM from {"":["0","auto"],"excludedCommitMessages":"","excludedRegions":"","excludedRevprop":"","excludedUsers":"","includedRegions":"","locations":

{"local":".","remote":"<removed-long-url>"}

,"value":"2","workspaceUpdater":{"stapler-class":"hudson.plugins.im.build_notify.PrintFailingTestsBuildToChatNotifier"}}
at hudson.model.Descriptor.newInstance(Descriptor.java:575)
at hudson.scm.SubversionSCM$DescriptorImpl.newInstance(SubversionSCM.java:1814)
at hudson.scm.SubversionSCM$DescriptorImpl.newInstance(SubversionSCM.java:1478)
at hudson.scm.SCMS.parseSCM(SCMS.java:63)
at hudson.model.AbstractProject.submit(AbstractProject.java:1790)
at hudson.model.Project.submit(Project.java:197)
at hudson.model.Job.doConfigSubmit(Job.java:991)
at hudson.model.AbstractProject.doConfigSubmit(AbstractProject.java:699)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.kohsuke.stapler.Function$InstanceFunction.invoke(Function.java:288)
at org.kohsuke.stapler.Function.bindAndInvoke(Function.java:151)
at org.kohsuke.stapler.Function.bindAndInvokeAndServeResponse(Function.java:90)
at org.kohsuke.stapler.MetaClass$1.doDispatch(MetaClass.java:111)
at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53)
at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:574)
... 63 more
Caused by: java.lang.IllegalArgumentException: Failed to instantiate class hudson.scm.SubversionSCM from {"":["0","auto"],"excludedCommitMessages":"","excludedRegions":"","excludedRevprop":"","excludedUsers":"","includedRegions":"","locations":

{"local":".","remote":"<removed-long-url>"}

,"value":"2","workspaceUpdater":{"stapler-class":"hudson.plugins.im.build_notify.PrintFailingTestsBuildToChatNotifier"}}
at org.kohsuke.stapler.RequestImpl$TypePair.convertJSON(RequestImpl.java:633)
at org.kohsuke.stapler.RequestImpl.bindJSON(RequestImpl.java:377)
at org.kohsuke.stapler.RequestImpl.bindJSON(RequestImpl.java:373)
at hudson.model.Descriptor.newInstance(Descriptor.java:566)
... 80 more
Caused by: java.lang.IllegalArgumentException: Failed to convert the workspaceUpdater parameter of the constructor public hudson.scm.SubversionSCM(java.util.List,hudson.scm.subversion.WorkspaceUpdater,hudson.scm.SubversionRepositoryBrowser,java.lang.String,java.lang.String,java.lang.String,java.lang.String,java.lang.String)
at org.kohsuke.stapler.RequestImpl$TypePair.convertJSON(RequestImpl.java:627)
... 83 more
Caused by: java.lang.IllegalArgumentException: Failed to instantiate class hudson.scm.subversion.WorkspaceUpdater from

{"stapler-class":"hudson.plugins.im.build_notify.PrintFailingTestsBuildToChatNotifier"}

at org.kohsuke.stapler.RequestImpl$TypePair.convertJSON(RequestImpl.java:633)
at org.kohsuke.stapler.RequestImpl.bindJSON(RequestImpl.java:377)
at org.kohsuke.stapler.RequestImpl$TypePair.convertJSON(RequestImpl.java:625)
... 83 more
Caused by: java.lang.IllegalArgumentException: Specified type class hudson.plugins.im.build_notify.PrintFailingTestsBuildToChatNotifier is not assignable to the expected class hudson.scm.subversion.WorkspaceUpdater
at org.kohsuke.stapler.RequestImpl$TypePair.convertJSON(RequestImpl.java:603)
... 85 more

Generated by Stapler at Fri Aug 24 17:52:24 CEST 2012
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Please let me know if further details are required.