This weekend, the Joomla! team announced the release of Joomla! 1.5.20 senu takaa . This addresses a security issue with Joomla! 1.5.19, released a few days earlier. If you've already upgraded, then you might have noticed the addition of the Mootools 1.2.4 upgrade plugin to the core plugins list. Administrators should keep in mind that Linkr was built for Mootools 1.11, and enabling this plugin might decrease Linkr's usability.
On an unrelated note, some changes are being pondered on with regards to this site. One of them is replacing the Linkr support page with a dedicated forum, where ideas can be shared more efficiently. Stay tuned for more updates.