The documentation (http://www.atlassian.com/software/jira/docs/v3.4.2/querysyntax.html?clicked=jirahelp) states:

Note: The NOT operator cannot be used with just one term. For example, the following search will return no results:
NOT "atlassian jira"

I would like this to not be true. I have a filter that shows me everything that is open and targeted for a particular release. I would like to have another filter that shows me everything that is open that isn't targeted for that particular release.