The new update arrived today; claimed fixes are

• iChat video conferencing
• Safari rendering of web pages
• usability of Dashboard and widgets
• viewing of QuickTime streaming media behind a firewall
• printing to some Epson printer models
• iDisk and Portable Home Directory syncing
• time zone and daylight savings for 2006 and 2007
• VPN connections to Cisco servers when using NAT
• compatibility with third party applications and devices
• previous standalone security updates Seems like nothing major
  Download here, or from the update manager