R 1.9.1 fails to install for Mac 10.2.8 (PR#7190)

Full_Name: Steven Bagley
Version: 1.9.1
OS: Mac 10.2.8
Submission from: (NULL) (4.10.4.91)


Was running R 1.9.0 on iMac (10.2.8) without problems.  Tried to run installer
for 1.9.1, but this stops after only several seconds, saying "There were
problems installing the software."  Problem is repeatable, even after repairing
file permissions.  Installation log file shown here:

R 1.9.1 Installation Log
	Target Selection
		_volumeAppeared: Adding volume Macintosh HD
		deactivate: removing all cells from _volumeMatrix
	Selected volume "Macintosh HD"
		Mounted at: /
		OpenFirmware: mac-io/ata-4@1f000/@0:5
		Partition type: HFS+
		Partition map: disk0s5
		Partition: 5
		Protocol: ATA
		Media Type: Generic
		Volume Size: 80019709952
	rm: 
	/Library/Frameworks/R.framework/Versions/Current
	: 
	Permission denied
	rm: 
	/Library/Frameworks/R.framework/R
	: 
	Permission denied
	rm: 
	/Library/Frameworks/R.framework/Resources
	: 
	Permission denied
	rm: 
	/Library/Frameworks/R.framework/Headers
	: 
	Permission denied
	The preflight script in R framework failed.
	Install Failed
	Error detected
	Name: NSGenericException
	Reason: The preflight script in R framework failed. (code 1)