I started the Savage Tide a few months ago, version 3.5 as written, and have just finished Kraken's Cove; the party is on the way to warn/save Lavinia. Four of six have Savage Fever.
I am on the fourth fatality. My first fatality was session 1, from the Rhagodessa in the hold of the Blue Nixie. Despite hearing the scream, crashing, and ruckus, the brave 6 HP rogue jumped down alone. He was a noble, and his father raised him, banning him from further adventuring. He ignored that advice, and rejoined the group tracking Vanthus to Parrot Island. Alas he perished again to the hidden crabs, alongside the cleric who were both hanging back (by the water) while the heavies pursued turned ravenou: fatalities 2 and 3. The fourth was, Magali, cleric of Istus, who was quite appealing to the cook and his hungry savage customers in the mess hall.
Now they are 4th level, and have a deep hatred of Vanthus and fear of the Shadow Pearls.