I addressed the usability issue of the select element filter user script for Greasemonkey. The list is no longer accidentally gets filtered on the text value of the selected option. I now always show the select control which is a much better way of showing the selected option.
There are still a few points that need attention (positioning for example). I'll post a new version later this month.
Introduction of this script can be found in a previous post.
Update 2005-10-04: improved version is available.