I'm currently preparing a patch for this. Since this is the first time I do
something with hudson plugins, it may take some time. But I'm confident to have
something ready this week.

Thanks, let me know if you need some help.

Created an attachment (id=555)
Patch

Got it done much quicker than I thought

There's however one issue I'm not sure of:
How is the migration of old settings for the tasks plugin handled? If I've
understood the plugin guide correctly, adding a new field, as I've done, should
be no problem. Old behaviour should be preserved as ignoreCase=false should be
the default. Is that right?

For boolean values with default 'false' nothing special has to be done.
Otherwise you need to set the default value in the readResolve method.

Thanks for the patch. I'm currently restructuring some base classes... I will
integrate your patch as soon as I'm finshed.

Code changed in hudson
User: : drulli
Path:
trunk/hudson/plugins/tasks/src/main/java/hudson/plugins/tasks/TasksPublisher.java
trunk/hudson/plugins/tasks/src/main/java/hudson/plugins/tasks/TasksReporter.java
trunk/hudson/plugins/tasks/src/main/java/hudson/plugins/tasks/parser/TaskScanner.java
trunk/hudson/plugins/tasks/src/main/java/hudson/plugins/tasks/parser/WorkspaceScanner.java
trunk/hudson/plugins/tasks/src/main/resources/hudson/plugins/tasks/config/tasks.jelly
trunk/hudson/plugins/tasks/src/main/resources/hudson/plugins/tasks/config/tasks.properties
trunk/hudson/plugins/tasks/src/main/resources/hudson/plugins/tasks/config/tasks_de.properties
trunk/hudson/plugins/tasks/src/test/java/hudson/plugins/tasks/parser/TaskScannerTest.java
trunk/hudson/plugins/tasks/src/test/resources/hudson/plugins/tasks/parser/tasks-case-test.txt
http://fisheye4.cenqua.com/changelog/hudson/?cs=15563
Log:
[FIXED JENKINS-2904] Added toggle option for case insensitive open tasks.