Yesterday (sorry for not posting it was a crazy day), Apple released OS X 10.4.5 via software update. It fixes a few items in Safari, Dashboard, and specifically FrontRow. There are a lot of updates that are MacIntel specific.
Also they released updates for the iLife ’06 aps. It seems as if ALL of the programs include updates that increases stability and other minior issues, like photocasting in iPhoto.
If you haven’t gotten these updates automatically, you might want to click on the little Apple logo and get the Software Updates.