Error in Netscape when space in filter name

When I create a filter and give it a name that has spaces in it and then try to show that filter I get an error. On ya'lls web site I get a nice neat error stating that the filter could not be displayed. On my JIRA appliation, using the same Netscape browser I get the following error message:
Bad Request

Your browser sent a request that this server could not understand.

The request line contained invalid characters following the protocol string.

the offending url is: http://localhost/jira13/secure/IssueNavigator.jspa?mode=hide&requestName=Issues with test in the comments.

In other browsers (IE, Konqueror) the spaces are encoded in the url like: http://localhost/jira13/secure/IssueNavigator.jspa?mode=hide&requestName=Issues%20with%20test%20in%20the%20comments.

Also, I added a comment to JRA-405 about tab placing the focus from the username on the login form into the address bar. The issue had been resolved so I didn't know if you still get e-mail notifications, but I am still seeing this behaviour in version 1.3.1.

Most of our users will be Netscape users...