I just upgraded to SMF 2 RC3. Let me know if you have any issues:
Highlights of this release include:
* Several security-related fixes.
* Better compatibility with RTL languages.
* Added curvy headers to loads of tables throughout SMF for the best Curve experience.
* Fine-tuned conversation view in the personal messages section.
* Improved read tracking of topics; e.g. topics are now marked as read by pages, to allow easier resuming of reading.
* Several tweaks to the WYSIWYG editor; now automatically disabled on mobile devices.
* Post screens (new topic, etc) are center aligned again.
* Buttons are now aligned much more consistently throughout SMF.
* Row color alternation to most of the tables in the administrative areas.
* Redesigned profile statistics centre.
* Fixed install and upgrade script for PostgreSQL.
* Updated help section.
* Revamped SSI examples page.
* Rephrasing of several error messages.
* Improvements to the package manager's archive extraction algorithm.
* Toggling of full size versions of resized images.
* Altered styling for quotes and code blocks.
http://www.simplemachines.org/community/index.php?topic=369616.0 for more info.