Finally, 2.4 is ready for download. Check the changelog or the source code for new features and fixes. One much requested new feature is disabling drive types. Now you can disable folder size for your network drives. Or disable it for your USB drive if it's not unmounting properly. But you might as well leave them all on, because it uses less memory now. If you could look what is in all the memory it's using, it would be mostly strings of paths. These are now all relative paths instead of absolute paths. It's still storing every relative path twice, so it could be cut down quite a bit more.
Finally you can download a 64-bit version! I've had it working for a while, but wanted to finish other changes before making install packages. It's kind of a pain to manually make installers, and make sure I haven't screwed up anything in the code. After I posted the 64-bit version, the next day I noticed that I posted the wrong file, that had a bug with logging into network drives. I updated the file without changing it in any other way, which is not a nice thing to do according to the MSI rules, but I didn't want to update all those files too. Hopefully no one will notice. It will be interesting to see which package is more popular!
I don't know if there will be a Vista version. An Ubuntu version is looking more likely.