Julian at the File Sharing Blog tested a bevy of P2P apps, including KaZaA, BitTorrent, and LimeWire, on Windows Vista Beta 1, and found that about half of them exhibit serious GUI issues, the other half had serious network issues, and none of them worked well. While it's unreasonable to expect a beta -- and especially a beta of a Microsoft OS -- to perform especially well, these results seem staggeringly bad. Is Vista really beta-quality software yet?