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.
The idea of search correlations came to me about a week ago with a jolt and an a-ha moment as I've been going through my list of features in the original client that have yet to be implemented in SoulseekQt. One item in particular stood out as a real take-it-or-leave-it deal. Ye Olde and Notoriouse Things I Like recommendations system has reached a point of total entropy years ago. It's still in use, but almost nothing has changed. The things that were at the top of the list five years ago are still there, effectively unbudged. Everybody more or less really likes the same things. But there's a big difference between what people like, and what people are curious about. The algorithm that correlates items in one's list of things they like is quite effective, but could be put to much better use if applied to what people are searching for. Many server reboots later, the system appears to work. In SoulseekQt, this added value is rather unobtrusive. Search for something with existing correlations and a list of them will pop-up to the right. Click on any item in the list and it'll be entered into your search box, ready and willing. I've already come across a slew of intriguing pointers, as well as a fair number of redundancies, and a few common misspellings.
If you've used search filters at all you probably know by now how handy they can be. But typing iscbr minbitrate:256 mfif:8 for every search when you know how you like it gets tiresome. This I knew almost as soon as I got filters working. I knew I wanted to let the user have the ability to save their filters, and the way it ended up is about exactly how I envisioned it. A save filter button to the right, a dropdown of saved filters to the left. You'll find a nice bit of dynamism at work here if you play with it long enough.
Links on the download page!