The Adobe® Photoshop® Lightroom® 1.3.1 update includes these enhancements:
• Additional camera support for the Canon 1Ds Mark III, Nikon D3, Nikon D300, Olympus E-3, and more
• Updated Mac OS X v10.5 Leopard support
http://www.adobe.com/support/downloads/detail.jsp?ftpID=3815
http://download.adobe.com/pub/adobe/lightroom/win/1.x/LTRM_WWEFG_win_1_3_1.exe
