We have our jira installation at the following URL within the JPMorganChase intranet:

http://jira.uk.jpmorgan.com/fort/irfe

... with the base URL for the installation set accordingly.

When I attempt to do a bulk delete of issues, and get as far as the final screen indicating a confirmation, clicking the button attempts to route to...

http://jira.uk.jpmorgan.com/secure/BulkDeletePerform.jspa

... rather than...

http://jira.uk.jpmorgan.com/fort/irfe/secure/BulkDeletePerform.jspa

... and I get a "Page not found" error in the browser.

I notice from viewing the page source that all other links on the page contain relative URLs of the form, for example,

src="/fort/irfe/images/icons/bullet_done.gif"

.. whereas the button for the confirmation has the action

action="/secure/BulkDeletePerform.jspa"

... missing off the /fort/irfe

As a workaround, I found that entering

http://jira.uk.jpmorgan.com/fort/irfe/secure/BulkDeletePerform.jspa

... directly into the browser address bar at this stage had the desired affect.