I think they had changed the formula a few months before I got my first crested and then they changed it again, maybe 6 months or so ago, don't really remember when. I've heard some say their geckos didn't like the change and were hard to get switched over, but mine didn't really have a problem.
My male refuses to eat anything but the original flavor, he doesn't care which formula, and the female Maui doesn't like the original flavor, though she will eat more of the new formula original flavored CGD. The newest formula seems to be the best so far, mine all put on a growth spurt after switching to it.
They just introduced other flavors in a one part mix, I'm exited to try those, I've got two flavors of the old two part CGD that have to be mixed together for Maui, it will be so nice not to have to mess with mixing it!
When I get a sec, I'll go thru the book I have and see what in there is wrong and let you know. It does have some useful info in it, just have parse through it.
Will probably not be until Monday, though. I'm going to Montana with my boyfriend today and staying with his mother until Sunday. It's the first time I'll be meeting her, scary!