See this in the log when Jenkins restarts. Revert to 4.32 plugin version is fine

Jan 18, 2012 9:58:22 PM jenkins.InitReactorRunner$1 onTaskFailed
SEVERE: Failed Loading job axx_main
java.lang.NoClassDefFoundError: hudson/plugins/findbugs/FindBugsProjectAction
at hudson.plugins.findbugs.FindBugsPublisher.getProjectAction(FindBugsPublisher.java:147)
at hudson.tasks.BuildStepCompatibilityLayer.getProjectActions(BuildStepCompatibilityLayer.java:73)
at hudson.model.Project.createTransientActions(Project.java:208)
at hudson.model.AbstractProject.updateTransientActions(AbstractProject.java:602)
at hudson.model.AbstractProject.onLoad(AbstractProject.java:272)
at hudson.model.Project.onLoad(Project.java:88)
at hudson.model.Items.load(Items.java:115)
at jenkins.model.Jenkins$14.run(Jenkins.java:2372)
at org.jvnet.hudson.reactor.TaskGraphBuilder$TaskImpl.run(TaskGraphBuilder.java:146)
at org.jvnet.hudson.reactor.Reactor.runTask(Reactor.java:259)
at jenkins.model.Jenkins$5.runTask(Jenkins.java:812)
at org.jvnet.hudson.reactor.Reactor$2.run(Reactor.java:187)
at org.jvnet.hudson.reactor.Reactor$Node.run(Reactor.java:94)
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:619)
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.