Mostly a bug fix release - here we're clearing out a number of errors that crept in from 6.x-2.8, as well as handling a few new unicode characters for urls, as well as a change which should allow the unicode character code to work in PHP 4.
On the new functionality side, we've got some tweaks to the views support, including formatting the plain title of the link and support for Views 3. It's also now possible to turn off link validation for a field, in case you need to include some seriously non-standard urls.
The full list:
Patch #425536 by JamesAn: Fix a minor typo.
bug report #625552 by jcfiala: removed default values from field value attributes so that the field attributes can properly override them. Also added simpletest to test the fix.
task #438770 by jcfiala: added test for rel='nofollow' functionality.
task #438770 by jcfiala: Adding more tests to validate various urls.
bug report #660138 by chris_bbg888: Changing validation to include letters with umlouts.
User interface #335281 by thePanz:Adds title attribute to links.
bug report #685874 by jcfiala:Changed code to allow {, } in querystrings.
User interface #335281 by thePanz, jcfiala: Now if the title matches the link title, the title is not included in the link.
bug report #376818 by pauline_perren,jeffschuler,dropcube: extended the url field to accept 2048 characters, god help us.