I can now say fairly definitively that I've noticed accorhotels.com appears to use cookies to INCREASE the price of rates for people that have used their website before such as Le Club Accorhotels members.

Searching for a recent booking, the price for the same room at the same property, was 100€ on one machine and 85€ on the other. I tried the search several times and then deleted cookies and the lower quotation came back. This is not the first time I've noticed this but I wanted to be sure before posting it on FT.

This is really a pain and I'm not sure there is an easy way around this one.