Specifically mentions "Promise Ultra ATA" controllers as being incompatible. Promise has no products of this name, although they do have a hardware RAID controller which might be the culprit. Easily confused with Promise Ultra/33 EIDE controller (which works perfectly). [not connected with Promise]
Sorry for the problem. This list is in need of updating and will be done soon due to the release of the new 2.2 kernel. Please bear with us.