Can't say that it's anything new, but AT&T has re-released the "new and improved" version of OS 18.104.22.1687 after pulling it earlier in the month due to call quality issues. Those that downloaded 22.214.171.1247 prior to it being pulled may want to re-install it, as it appears that the Software Platform has changed from 126.96.36.199 to 188.8.131.52 (as seen in the picture above). New features such as Visual Voicemail are back, and call quality is said to be "improved."
Those that opt to download the new OS, please let us know what you think via the comments section! OS 184.108.40.2067 can be downloaded here.