I'm currently using bugzilla at work, and it has the same problem you mention with trac - adding new tickets is a pain in the ass. However, I love the integration with Mylyn http://www.eclipse.org/mylyn/ because I spend my whole day in eclipse. If you use eclipse, mylyn integration is a huge plus - just because you can set a context and it will track how long you spent working on a task, as well as your estimate. Outside of eclipse and the office, I use an instance of tiki-wiki running on the same VPS I use for SVN. Tiki has a lot of features, but the default interface blows.