The Asterisk and Zaptel development teams have released Asterisk 1.4.1. This release contains a very large number of bug fixes, including a fix for the recently discovered security vulnerability.
It also contains a complete rewrite of the Shared Line Appearance (SLA) support that was first released as part of Asterisk 1.4.0. The new version of this functionality has been tested against a variety of phones and provides much more flexibility and configurability (along with actually working properly in most scenarios, which the original implementation failed to do). Users who are interested in SLA functionality should update to this version and try it out; we welcome bug reports and test reports.
Because of the security vulnerability fix present in this version, all users of Asterisk 1.4 are urged to update as soon as they can schedule it.