Creative has released an official 2.18.0015 driver for the majority of the X-Fi series under Windows 7. This driver fixes several issues including long shutdown times, and passthrough of Dolby/DTS audio to an external decoder not working with Windows Media Player 12.
Creative has released an official 2.17.0008 driver for most of the X-Fi Titanium series under Windows XP, Vista and 7. This driver improves the loading time of the Audio Control Panel and enables selection of other microphones. It also includes a range of fixes.