So we already have "inclusion" filtering in the form of clicking on "Open", "Closed", "New" status links, or product names etc. This causes us to include only issues which belong to a particular category.

But often I find myself wanting to do "exclusion" filtering, in the sense of "show me all issues except for ones which match this category". A common example would be "show me all issues except for closed ones".

There are two ways I could implement this:

1. In the search interface convert the pop-up menus into multi-section lists
2. Or add checkboxes or similar above the table (perhaps hidden inside a "filter" div) which would allow the user to exclude a certain category; if I took this path I would most likely start with the obvious candidates for exclusion only, "closed" issues.