DC
Helsingin UA
I have the Toivonen book and it says:
"I've practiced nearly all the stages three times"
So one would think it unlikely a pace note error. Especially with a lead of over two minutes Henri and Sergio would not have felt under so much pressure.
And in addition to this (every stage practiced three times), you have to keep in mind that Henri was supposed to do Tour de Corse already in 1985, but that unfortunate accident in Costa Smeralda canceled those plans. I read from Finnish magazine "Vauhdin Maailma" that Henri had already been practicing (every stage atleast once) and doing pace notes for the 1985 Tour de Corse before Costa Smeralda (based on Henri's own column).