(original news post follows)
My Photoshop CS Upgrade arrived recently and I installed it on the Dual G5 under 10.3. I searched the entire CD for any "G5" specific optional plugins/extensions and found none, so I assume the default install has G5 support/optimizations embedded. (The CS readme file also says to not use PS 7 plugins with CS.) I launched PS CS and set the preferences to match those used for my recent PS 7.0.1(G5) tests (History and cache set to 4, scratch disk set to a separate non-journaled volume, max PS memory use set to appx 1.8GB (max) with 4GB of RAM installed) and then ran the same 20 filter action script as used with PS 7.0.1 to see how performance compared on the Dual G5 w/4GB of RAM installed.
I know CS adds some new features that many welcome, but many expected CS to be more optimized after the comments at Apple's website page on Photoshop CS:

" Optimized for the Power Mac G5
The Power Mac G5's high bandwidth architecture and 64-bit processor provide a huge boost to the new Adobe Creative Suite. ... To speed your work even more, both Photoshop CS and Illustrator CS are optimized to take advantage of the G5. ... Photoshop CS integrates (emphasis mine) the software from the G5 Processor Plug-in to modify many Photoshop operations such as the new RAW format support to fully utilize the Power Mac G5's capabilities... "

Although Adobe's PS CS page didn't note that, I had hoped for improved performance over v7.0.1 (w/G5 update) running on the Dual G5, but saw the opposite. Here's a graph of the results of running the same 20 filter/actions script with 4GB of RAM installed in the G5.

I later also ran the 108.3MB image file test with 1.5GB of RAM installed and PS set to use 70% of available RAM. (As before, no other apps running.)

108.3MB image file/20 filter/actions
• PS CS = 330 sec.
• PS 7.0.1(G5) = 225 sec.

I've written an Adobe contact to see if he has any suggestions/comments on this. I checked Adobe's website support/downloads page for any PS CS updates and as of Nov.11th, there are none. As I mentioned previously, Photoshop CS like previous versions can't recognize more than 2GB of installed RAM.
As time allows, I want to run the PSBench script which allows recording the times for each filter to see more than just a total time comparison. (i.e. are all filters slower or are there some specific filters that are much slower in PS CS than 7.0.1.) In the meantime I've added the above to the previous page of PS tests with 512MB to 8GB of RAM installed in the G5.

"Trans Intl. today announced the availability of a 1 Gigabyte (GB) DDR (Double Data Rate) memory upgrade module for the newly released Apple ibook G4 800 Mhz, 933 Mhz, 1 Ghz Model.Trans Intl.'s 1 Gigabyte (GB) memory modules double the system's main memory in the ibook G4 models to 1152 Megabytes (MB) of available RAM.
The ibook G4 models have one available memory expansion slot for main memory expansion and 128 MB of RAM soldered on the system logic board. Trans Intl.'s 1 Gigabyte (GB) memory upgrades double the memory density of the available memory expansion slot to 1 GB. Without this upgrade, the system memory capacity was limited to a total of 640 MB of main memory as currently specified in Apple documentation. Pricing and availability:
Apple iBook G4 800 Mhz 12 inch Model, G4 933 Mhz 14 inch Model and G4 1 Ghz 14 inch Model. TransIntl has recently introduced 1 GB Memory Modules for Apple Power Macintosh G5 2GHz/1.8 GHz ($319 for PC3200) and G5/1.6GHz models ($219 for PC2700)"

For Dual G5 tests with 512MB, 1.5GB, 2GB, 4GB and 8GB of RAM using OWC 16chip/1GB dimms, see this previous article.
While on the subject of RAM, since the release of the new Powerbook models (12in, 15in, etc.) I had two reader reports in the past of problems with several 3rd party memory modules (sleep/wake from sleep issues or KP's). I asked Transintl and OWC about this and was told this issue has been addressed, but that some previous modules had these issues in the new design powerbooks.

The FAQ also has the previous tip that some owners of 3dfx, Formac Proformance III and IXmicro graphics card owners used to solve the "rom too old" issue - although two readers with AGP macs using both a supported AGP card and unsupported older PCI card like these noted they had a problem after trying that nvram patch. (Clearing the NVRAM solves that issue typically for those that saw a problem. The FAQ's Apple G3, G4 and G5 sections have info on clearing/resetting the NVRAM.)

Listing of files updated in 10.3.1

./Applications/Utilities/Terminal.app/Contents/Info.plist
./Applications/Utilities/Terminal.app/Contents/MacOS/Terminal
./Applications/Utilities/Terminal.app/Contents/version.plist
./System/Library/CoreServices/SystemVersion.plist
./System/Library/CoreServices/loginwindow.app/Contents/Info.plist
./System/Library/CoreServices/loginwindow.app/Contents/MacOS/loginwindow
./System/Library/CoreServices/loginwindow.app/Contents/version.plist
./System/Library/CoreServices/loginwindow.app/loginwindow
./System/Library/CoreServices/webdavfs.bundle/Contents/Info.plist
./System/Library/CoreServices/webdavfs.bundle/Contents/Resources/English.lproj/Localizable.strings
./System/Library/CoreServices/webdavfs.bundle/Contents/version.plist
./System/Library/Extensions/IOStorageFamily.kext/Contents/Info.plist
./System/Library/Extensions/IOStorageFamily.kext/Contents/MacOS/ IOStorageFamily
./System/Library/Extensions/IOStorageFamily.kext/Contents/Resources/English.lproj/InfoPlist.strings
./System/Library/Extensions/IOStorageFamily.kext/Contents/Resources/External.icns
./System/Library/Extensions/IOStorageFamily.kext/Contents/Resources/Internal.icns
./System/Library/Extensions/IOStorageFamily.kext/Contents/Resources/Removable.icns
./System/Library/Extensions/IOStorageFamily.kext/Contents/version.plist
./System/Library/Extensions/webdav_fs.kext/Contents/Info.plist
./System/Library/Extensions/webdav_fs.kext/Contents/MacOS/webdav_fs
./System/Library/Extensions/webdav_fs.kext/Contents/version.plist
./System/Library/Frameworks/JavaVM.framework/Versions/1.3.1/Home/lib/security/java.security
./System/Library/Frameworks/JavaVM.framework/Versions/1.4.1/Home/lib/security/java.security
./System/Library/Frameworks/JavaVM.framework/Versions/A/Resources/version.plist
./sbin/mount_webdav
./usr/libexec/load_webdav
./usr/share/man/man8/mount_webdav.8

• Other World Computing G4/1.26GHz in G4/AGP (rated 8)
• PowerLogix G4/1.2GHz in (digital audio) G4/AGP (rated 10)
  (My reviews of G4 and G3 upgrades w/apps/game tests, install info, etc. are linked here. OC/CPU module articles are on the Systems page.)

(Warning - Overclocking may not be reliable and could lead to hardware failure or corrupted data.) You can find the full reports by searching the database selecting the indicated Mac model and upgrade card brand/type. If you've upgraded the CPU on your Mac, please post an entry in the database. Search the database for entries from most every upgradable Mac model *before* you buy. (Searchable by mac model/upgrade brand). For detailed reviews with performance tests and install tips, see the CPU Upgrades page.)

CDRW Drives:
• Firewire (IDE drive in FW case) Liteon LTR-52327S (52x32x52x) used w/iMac slot-loading (OS X 10.3)
  
  Combo DVD-CDR Drives:
• Firewire (IDE drive in FW case) Liteon LTC-48161H (48x24x48x + 16x DVD-ROM) used w/iMac slot-loading (OS X 10.3) (no native iApps burn support)
  
  DVD+R/RW + DVD-R/RW Drives:
• IDE LG GSA 4040B in G4/AGP (OS X 10.3)
  (no iapps burn support)
• IDE Pioneer DVR-106 in eMac (OS X 10.3)
  (problems noted - not sure if a "RD" model perhaps)
• IDE Pioneer DVR-106 in Dual G4 DDR (OS X 10.3)
• IDE Pioneer DVR-106 in Single G4 DDR (OS X 10.3)
  (noted drive sleep/spindown issue/KP)
• IDE Pioneer DVR-A06/106 in 8500 using IDE PCI card (OS X)
• IDE Sony DRU-500A in G4/AGP (OS X)
  (updated to 10.2.8 and lost support - OS X 10.1.x/10.2.x updates always overwrite any plugins that have the same name as the standard set. Also remember 10.3 is not compatible with prev. OS X modified plugins or patchburn.)
  (Illustrated CD drive install guide here covers G4 towers up to the Digital Audio Model, Beige G3 MT, B&W G3 and 8600/9600 Macs)
  
  DVD-R Drives:
• Firewire Lacie (Pioneer DVR-105 drive) used w/G4 Cube (OS X 10.3)
  
  Hard Drives:
• Firewire Simple Technology 20GB used w/B&W G3 (OS 9.2)
  (problems noted)

You can find full owner reports (latest shown first) by searching the database by drive/brand/interface/mac models (the latest reports are shown first in searches). For guides to installing CD/CDRW/DVD drives or Hard drives in many mac models, see the IDE Articles page. The Firewire articles page also has guides on case kits, installing drives, etc.
If you've added a IDE, SCSI, Firewire or USB hard drive, CDRW, tape drive, etc. make sure you add a report to the database. (If you post an updated entry - make sure you use the same name, etc. as you did before so I can find your past entry. Thanks.)
(Incomplete entries are deleted. Do not post questions in the database, it's for drive reports not questions on what drive to buy - for that try searching the database for reports from owners of your mac model on the drive type/brand/interface, etc. you're interested in.)

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