Ok, thanks for the info! I'll have to try the alcohol idea, it sounds like good advice!

I'm having some difficulties with preparing my raspberry/blueberry sorbet. I've prepared the recipe as directed; pureeing all the fruits, boiling the sugary syrup, and chilling the mixture for the alloted time. Now, I've been churning the potential sorbet in my icecream maker for hours on end, and all I get is this fruity foam, nothing like what I imagined sorbet should be like. What am I doing wrong?