The latest version of RSS Submit 5 - 2014 Edition has been released, now updated to version 5.906 / 1.9. This fixes a compatibility issue with the latest version of Firefox 32, where users may have been experiencing timeouts while beginning a submission. Be sure to click the upgrade button in the software to make sure you have the latest version.
Still using RSS Submit 3? Download a free trial of RSS Submit 5 and give it a try!