1.4b4 base updates and custom pkgs not installing properly

I have tried this twice now and both times my packages fail to install while writing the receipt.

I am using instadmg1.4b4 using an OEM 10.5.4 iMac DVD. The OS installs, the cache image is created, and 10.5.5 combo update is successful. After that *nearly* all other packages fail. Here is an example from the log

installer: The software was successfully installed..... 
		installer: The install was successful. 
	Base OS installed
	Compacting and saving cached image to: ./Caches/BaseImageCache/C81A26C2:d3b008d00135a84613ad2b80737c8c03b2feca7b.dmg
		"disk5" unmounted. 
		"disk5" ejected. 
	Remounting the image with a shadow file (/tmp/instaDMGTemp.dCYSeu.sparseimage)
		/dev/disk5          	GUID_partition_scheme 
		/dev/disk5s1        	EFI 
		/dev/disk5s2        	Apple_HFS                      	/tmp/instaDMGMount.qCSfMH 
14:29:14 ######Beginning Update Installs from ./InstallerFiles/BaseUpdates######
	Installing MacOSXUpdCombo10.5.5.pkg from ./InstallerFiles/BaseUpdates/01
		installer: Package name is Mac OS X Update Combined 
		installer: Installing at base path /tmp/instaDMGMount.qCSfMH 

<snip>

installer: The software was successfully installed..... 
		installer: The install was successful. 
	Installing QuickTime755_Leopard.pkg from ./InstallerFiles/BaseUpdates/02
		installer: Package name is QuickTime 
		installer: Installing at base path /tmp/instaDMGMount.qCSfMH 
		installer: Preparing for installation..... 

<snip>

installer: 	Writing files: 100% complete 
		installer: 	Writing package receipt 
		installer: The install failed (The Installer could not write the receipt for “QuickTime755_Leopard”.) 
	Installing iTunes.mpkg from ./InstallerFiles/BaseUpdates/03

Any body have any ideas? Has anyone else tried 1.4b4 with 10.5.5 combo update?