I applied sieverules.BETA.r2264.patch into
http://nightly.roundcube.net/trunk/roundcubemail-trunk-r2332-20090306.tgz successfully.
patching file index.php
patching file plugins/sieverules/add.png
patching file plugins/sieverules/config.inc.php
patching file plugins/sieverules/help.png
patching file plugins/sieverules/Net_Sieve.php
patching file plugins/sieverules/rcube_sieve.php
patching file plugins/sieverules/rcube_sieve_script.php
patching file plugins/sieverules/sieverules_func.inc
patching file plugins/sieverules/sieverules.php
patching file program/js/app.js
Hunk #4 succeeded at 2839 (offset 4 lines).
patching file program/js/sieverules.js
patching file program/localization/en_US/labels.inc
patching file program/localization/en_US/messages.inc
patching file program/steps/settings/delete_sieverule.inc
patching file program/steps/settings/edit_sieverule.inc
patching file program/steps/settings/save_sieverule.inc
patching file program/steps/settings/sieverules_ajax.inc
patching file program/steps/settings/sieverules.inc
patching file skins/default/functions.js
patching file skins/default/includes/settingstabs.html
patching file skins/default/sieverules.css
patching file skins/default/templates/editsieverule.html
patching file skins/default/templates/sieverules.html
When I clicked on the filter tab nothing happened. The reason I want to use this RC trunk is because it loads faster and many bugs have been fixed since 0.2stable.