I must start be saying that in my initial Peatarian days, I used to listen to some rpforum zealots who would authoritatively state whether a food was 'allowed' or not. Now, I rarely pay much attention to them as most of them come up with their own tinfoil theories.
After reading through some forum entries it seemed strawberries and berries in general were not considered in the 'approved' list. Having become very skeptical of the gurus and their theories, I went to the source:
"It's only the allergy reaction that people have to worry about with seedy berries, generally they are very nutritious and safe."
Now, I can pig out on strawberries ;-) Obviously, keep it organic if you want to partake and stop if you have any reaction.
Are there any other common fruits (in the US) that people have found useful outside of cooked apples, oj, watermelon and grapes ? I don't have access to the tropical fruits like lychees, paw paws etc.