On his blog, Adobe via the voice of John Nack puts an end to the polemic born of the nonofficial support of the CS4 suite with SSD disks. In fact, the aim of Adobe, with this prohibition, was the USB keys and other removable supports containing flash memory.
This is a good news, even though it is given on a blog and not of the official site. We find surprising nevertheless that they felt the need to put it in black and white such a prohibition knowing that it would not come to the minds of (practically) anybody to try to install the CS4 on a USB key.
[Update] Note that Adobe has not modified the specifications necessary to install the CS4. Officially, it still should not be installed on disks using Flash memory, which are UBS keys, a compact Flash andÂ… a SSD.
[translation by crispin]