Here’s a partial list since mid-December:
- Private messages—We are currently at 1.5M out of 2M private messages in staging. We will continue running the script over the weekend. Hoping to wrap up soon!
- Formatting fixes—Some posts that had broken formatting (especially blockquotes) have been fixed.
- Avatar configuration fixed—There was an intermittent issue with changing their profile picture. That has been fixed so you can go to your preferences and select the pencil icon next to your avatar.
- Titles—Members and Senior Members can now select those titles from their account preference page:
- Intermittent server errors fixed—One of our servers was acting up which caused unpredictable problems for users. We’re corrected the problem and added monitoring to catch this sort of problem if it arises in the future.
- Adjust reply display settings—There was some confusion about whether a post was a reply to a previous post or to the thread itself. We made adjustments that should help.
- Changed the emoji set—By default we were using the Twitter emoji set.
But now we use the more attractive Apple emoji. 
Rest assured we are continuing to make progress on importing likes and bookmarks.