This works correctly on the Joomla demo server with 4.6.0, but not on my Joomla with CiviCRM 4.6.8. Not sure if this is a problem with the more recent CiviCRM versions, or something else in my configuration.
On the demo server, if you create cases in CiviCase, then go to the CiviCase dashboard, you can click on the numbers in the grid layout showing how many cases of what case type have what case status. This works by adding parameters to the URL of &status=2 and &type=2 (for example).
On my installation, the destination page seems to pick up status correctly, but even when type=3, it comes to a page giving an error that it couldn't find any cases, and shows the wrong search criteria for type:
No matches found for: Case Status(s) = Processing ...AND... Case Type(s) In 1 ...AND... Application = All Applications
Why does it think I want case type of 1, when the URL specified type=3 ?
If, from this screen, I select the Case type I want and click Search it gives a correct report as expected. But it's very inconvenient to have those direct links from the dashboard not work.