Apple seeds Mac OS X 10.4.8 8L108/8L2108
While development on Leopard obviously continues behind closed doors (newer builds for developers are expected in September), Apple has also started working on the next update to Tiger and has seeded build 8L108/8L2108 to developers.
There are a couple of known issues with the build, but more importantly, Apple is working on several key areas in this build. Among the usual "improved stability and performance" fixes, Apple has specifically mentioned USB, AFP, DVD Player, graphics, iCal, iPhoto, Mail, modem/networking, printing, Rosetta (specifically scientific apps), Safari and Microsoft Word & OpenType fonts. Apple will still take some time before releasing 10.4.8. The OS update is believed to contain support for new hardware such as the MacBook and MacBook Pro updates expected in September.
This update seems to be one of the bigger ones, btw. - the Combo updater for intel is 305.5 MB in size. (The PPC builds are usually smaller - and of course so are the Delta updaters, which only have the required files for updating 10.4.7-10.4.8.)