Replying to a player forum post, a member of the Ultima Online development team said that a Kingdom Reborn client patch is scheduled to be released this week and that "The patch notes are... long. And awesome."

Some information about this future patch is also in the latest Five of Friday article:

We're planning to go to TC next week. Here are a few of the things you can look forward to:

• CatHat tweaked the tree colors to make them stand out more ("Everything is a big green blur!" has been a common complaint.)
• Added mouse-wheel targeting
• Added a bandage countdown
• You can select chat colors now, both overhead and in-window, and pick the background color (along with several other chat improvements)

That's not to mention all the performance improvements, the fully-moddable UI, Legacy Art Mode, legacy container art, and tons of tweaks, bug fixes, and improvements.