According to ThinkSecret [1], Apple has released new developer seeds for both Mac OS X Tiger 10.4.3 for PowerPC and Tiger 10.4.2 for Intel.

Over 500 bugs are fixed in the Tiger 10.4.3 update according to the site. As claims TwinMac [2], Tiger 10.4.2 for Intel is not only adding the features and bug fixes brought on Tiger 10.4.2 for PowerPC, but also some additionnal protections against running Tiger on other systems than the Intel based Mac provided by Apple in its Intel developer kit.