Some of our tests include hashes in their name/label causing Jenkins troubles when it tries to produce a link to these tests:

Let's take this test for instance:

spec/controllers/categories_controller_spec.rb.CategoriesController with a simple category hierarchy#index when path is valid.assigns @products and @highlight

Jenkins currently produces the following link:
http://hudson_fqnd/job/job_name/123/testReport/spec_controllers_categories_controller_spec.rb/CategoriesController%20with%20a%20simple%20category%20hierarchy#index when path is valid/assigns_products_and_highlight/

Which does not work since '#' is a special character in URIs is used to split the anchor (also called the URI reference) from the rest of the URI.

A fix would be to automatically replace '#' in test names by the javascript code %23.

Similarly for the question mark, which delimitates the query.
The equivalent escape code is %3F.

Ref. http://www.december.com/html/spec/esccodes.html

I'm not a Java programmer myself unfortunately, but let me know if there is anything I can provide or do to help you with this issue.