Close button sends client to the tray, statically linked Qt for OSX.
See the Changelog for list of features and fixes currently only available in the nightly builds.
I usually wait longer before releasing a new version, but I've been working on a user notes feature, and am quite pleased with how it turned out. So I figured, why the hell not. This is the equivalent of the user notes feature in the original Soulseek client, but with a better integrated, more prominent user interface that makes it less of a secret feature. To add or edit a user's note, use the corresponding context menu option. The attached note will appear next to their entry in your user list and any other list you put them in, meaning the unshared or ignored lists. This lets you use notes not only to specify why someone is in your buddy list, but also why you might have ignored or made your files unavailable to them. I'm particularly pleased with how user notes are integrated into room user lists. Users who have a note attached to them, independent of whether they're in any of your lists, will have a note icon on their row in a new column. Click it and you'll be able to edit their note right away. Just be advised that because of the way SoulseekQt stores column sizes and the newly added note column, room user list column sizes will probably be out of whack the first time you use the new version. Don't fret, just re-adjust the column sizes to your liking and they'll remain as you've set them.
Update: I couldn't resist sneaking one more thing in. The empty space reserved for the event bar goes unused the vast majority of the time, and it's really been rubbing me the wrong way as of late. I've made it so that it's hidden when no events are shown. The files pointed to by the download links for tonight's release were updated.
Links on the download page.