I've just ordered the upgrade cs5 extended upgrade. I've bought in april
(via my vendor) the creative suite 4 production premium. The support tells me now via chat that is unpossible to upgrade from the suite to cs5 photoshop ? So i have to buy the full photoshop version or the full suite version ? Is that true ? How ridiculous is that ?
Yes, what Support told you was right -- per Adobe's Creative Suite FAQ, you can only upgrade from suite to suite, not from suite to individual product...
This is likely because of the discounted pricing of Adobe's suite offerings - for example, the price of the Production Premium bundle is about 65%-off the cost of its component products if purchased separately.
They probably also want to encourage the use of the same or more of their products going forward, rather than fewer.