The difference now with CS5 is that the upgrade installer should accept the serial number from a qualifying earlier version on a different platform or language, which simplifies the cross-platform and cross-language process… However, for some reason (complexity?) this does not always work, in which case you would need to contact Adobe customer support to hopefully fix it. Hi Jason, thanks for your question – and that’s a very good one… In theory, your scenario could work without submitting a crossgrade – but in practice, your mileage may vary.
