Apple Insider reports that the first test builds of the software update for developers, including a 354MB bare-bones delta build and a 362MB combo updater, both of which were labeled Mac OS X 10.5.2 build 9C7 have started to circulate at Apple.
The list of fixes and Leopard code corrections in the 10.5.2 release is supposedly 76 items long. This is actually good news as we are experiencing some performance loss compared to the situation before the Leopard update on a MacBook.
The new Leopard update is expected in early 2008, possibly in time for MacWorld Expo mid-January.
More details on Apple Insider.