A couple of folks have written to ask whether it’s possible to upgrade from Photoshop CS3 Extended to Photoshop CS4 (the non-Extended version), or whether once you’ve bought Extended once you can only buy Extended in the future. The short story is that you have a choice.
It turns out there’s an oversight in our pricing and upgrade mechanisms, and CS4 pricing materials don’t list a way to go CS3 Extended->CS4 standard. We’re working to get that corrected now. You’ll need to call Customer Service if you’d like to go down this route, but you might want to wait a few days for them to get the details squared away.
Ultimately, if you choose to buy Photoshop Extended, we want it to be because it’s the version that you’ve determined best fits your needs–not because you don’t have options.