Re: Not pooping.. :(
Babies often slow way down in the poop department when solids are introduced. You want to be kind of cautious- when he does poop, take a careful look at him. Does he seem to be in pain? Is he turning red, straining, crying, screaming? Is the poop hard when it emerges, hard enough to roll right off the diaper? Is he going more than a week without pooping? If so, he's constipated and you want to back off on solids.
I don't think the foods or amounts of solids you've introduced are likely to be a problem, but again, keep an eye on things and keep the quantities small for a while.
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