Basically CSPI is stating that there are ingredients (such as alkalized cocoa and corn syrup) in the Ben and Jerry's flavors that are labeled all-natural. Ben and Jerry's contends that they are (1) following FDA guidelines, and (2) responsive to consumer complaints and interests.
Given the issues I have with HFCS, i pretty much knew that Ben and Jerry's ice creams were safe, with one exception: Cherry Garcia. Well, it turns out that about a year ago, Ben and Jerry's changed the formula for Cherry Garcia, removing the HFCS from the cherry mix. Why? consumer interest/demand.
So, two comments on the fact that Ben and Jerry's has made headlines for unnatural ingredients:
(1) at least they're responding to their customer base
(2) in a fundamental way, the FDA and their ludicrous notion of what is "natural" is the source of the problem