Clicking on any maven warning details results in an error as below. It doesn't seem that spaces in the path are to blame, but it could be it.

Content of file workspace

01 Copying the source file '/var/lib/jenkins/jobs/Labs Dev Tools Build/workspace' from the workspace to the build folder '/var/lib/jenkins/jobs/Labs Dev Tools Build/builds/2014-03-11_14-52-52/workspace-files/eff088c9.tmp' on the Jenkins master failed.
02 Is the file '/var/lib/jenkins/jobs/Labs Dev Tools Build/workspace' a valid filename?
03 If you are building on a slave: please check if the file is accessible under '$JENKINS_HOME/[job-name]//var/lib/jenkins/jobs/Labs Dev Tools Build/workspace'
04 If you are building on the master: please check if the file is accessible under '$JENKINS_HOME/[job-name]/workspace//var/lib/jenkins/jobs/Labs Dev Tools Build/workspace'
05 java.io.FileNotFoundException: /var/lib/jenkins/jobs/Labs Dev Tools Build/workspace (Is a directory)
06 at java.io.FileInputStream.open(Native Method)
07 at java.io.FileInputStream.<init>(FileInputStream.java:146)
08 at hudson.FilePath$34.invoke(FilePath.java:1797)
09 at hudson.FilePath$34.invoke(FilePath.java:1792)
10 at hudson.FilePath.act(FilePath.java:916)
11 at hudson.FilePath.act(FilePath.java:889)
12 at hudson.FilePath.copyTo(FilePath.java:1792)
13 at hudson.plugins.analysis.core.HealthAwareRecorder.copyFilesWithAnnotationsToBuildFolder(HealthAwareRecorder.java:398)
14 at hudson.plugins.warnings.WarningsPublisher.perform(WarningsPublisher.java:336)
15 at hudson.plugins.analysis.core.HealthAwareRecorder.perform(HealthAwareRecorder.java:333)
16 at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:20)
17 at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:781)
18 at hudson.model.AbstractBuild$AbstractBuildExecution.performAllBuildSteps(AbstractBuild.java:753)
19 at hudson.maven.MavenModuleSetBuild$MavenModuleSetBuildExecution.post2(MavenModuleSetBuild.java:1030)
20 at hudson.model.AbstractBuild$AbstractBuildExecution.post(AbstractBuild.java:706)
21 at hudson.model.Run.execute(Run.java:1690)
22 at hudson.maven.MavenModuleSetBuild.run(MavenModuleSetBuild.java:519)
23 at hudson.model.ResourceController.execute(ResourceController.java:88)
24 at hudson.model.Executor.run(Executor.java:246)