One of the more obscure facts listed in the Photoshop CS3 Beta FAQ page was information that Adobe is breaking from a long standing tradition of allowing anybody with a registered version-even back to Photoshop 1.0-to upgrade to the current version for the same price. From the FAQ: “Adobe will not offer upgrade pricing more than three versions back on Photoshop CS3.”
What this means is that people who are using Photoshop version 7 and above -WILL- get to upgrade to Photoshop CS3 for the upgrade price (which will be announced next week in New York City). But users of Photoshop 6 and earlier will not. At this point there is no information regarding whether earlier users will get any upgrade discount pricing.