Well well well
I am a great fan of Quidco but not too big to say when someone was possibly right (even Loz

)
I had to book a hotel last night and forgot to go via Quidco. Happy enough with the final price, I nearly booked it then realised you get 4% off if you use Quidco. Cleared all cookies of course, went to Quidco, clicked through to the hotel site - guess what - new higher price which spookily, when the 4% Quidco is deducted, pretty much exactly the same price as I got direct.
I will be watching this very closely now - if this is common it's greatly disappointing.