Don't beleive Windows is a color corrected application, and PS is. Therefore, you could see differences.
how did the whacked rgb PDI image linked on your other post display
my guess is your Windows app is ignoring embedded profiles (it's un-managed), and or you have color management 'broken' in Photoshop...
Yes there is always a difference, but we have networked systems.
I use the other to correct color, but the first system is way off.
Fine on other system.
honestly, i am not sure what you are talking about
what windows app
what system (are you booting off a network disk or local disk), what is its default monitor profile (the one Photoshop is using)
when you say there is a difference (in what app)
- do you mean the un-managed whacked blue (that would be a color management issue)
- do you mean the whacked RGB looks fairly normal but noticably off in color (how so and in what app) that would most likely be a monitor profile issue
You need to calibrate and profile your monitor so that it can be used by a color-managed application to display accurate color.
That process needs to associate a workable monitor profile with the monitor at the operating system level. Not all profiles are good - they're complex beasts and the software that makes them isn't always perfect.
Then you need to use a properly color-managed application to display your images. Both Photoshop CS3 and CS5 are properly color-managed applications. Few others are, though they exist. Notably Internet Explorer is NOT a properly color-managed applciation. Windows Picture Viewer can be - but only sometimes.
The realm of color-management laughs at any and all attempts to oversimplify things.