sounds like this to me - maybe diversification is OK, just not sure

Ulula organic baby food frequently asked questions
Why is infant formula milk modified? Why is sunflower oil added to infant formula? Why do I need to wait 4 to 6 months before introducing new foods? ...
www.ulula.co.uk/html/organic_baby_food_faq.php

Feeding Your Infant
Infants should be on human milk or infant formula for the entire first year. ... The second principle of introducing new foods is to introduce foods that ...
www.mindspring.com/~drwarren/feedbaby.htm

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Note added at 59 mins (2007-01-13 11:08:34 GMT)
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Cereal In Bottles?
My son is six weeks old and cries all the time, particularly at night. My mother-in-law says that I should put rice cereal in his bottle before bed and that this will make him sleep better. My pediatrician says it's best not to start solid food for some time, and advises against putting rice cereal in his bottle. My mother-in-law says this is crazy. She says that this is the way my husband was raised and he turned out fine. What do you recommend?
Anonymous


Parents of the previous generation have a wealth of experience to offer us. They have been through this stage of life before, and have seen many things that worked and many that didn't. Their input is valuable and worth considering carefully. Still, their input is typically from one or two generations of history. Since the time they were raising their children, many new facts have come to light. Listening carefully to the wisdom and insights of the previous generation and weighing them against the latest findings of science will often lead you to the best course of action.

Throughout most of human history and in most cultures, children were exclusively breast fed at least for the first year of life and often even longer than that. During the previous generation or two, when bottle feeding became very popular, solid foods were introduced at quite an early age. When babies were as young as a few weeks old, processed rice cereal was put into the bottle with formula. Most children were able to tolerate this rather well. A number of children did not tolerate this well, because their sucking and swallowing actions were not yet fully co-ordinated. As a result, many infants aspirated the rice cereal into their lungs which led to pulmonary problems.
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Drawing on the wisdom of many, many generations, experience, and the latest scientific knowledge, The Academy of Pediatrics recommends that solid foods be introduced, generally no earlier than four months of age. If a child weighs at least thirteen pounds and has good head control, solid foods can be started as early as three months. Four months old isn't the magical date to start solid foods, it is fine to start later than that, or as I mentioned, in some cases as early as three months. At about this age the caloric needs of a baby increase. At this age most babies need 24 to 32 ounces of breast milk (which is impossible to measure, but babies do an excellent job getting just the right amount) or formula, plus as much solid food as they want. The Academy of Pediatrics recommends starting with rice cereal. We do not recommend putting it in a bottle, but feeding it to a baby from a spoon. Rice cereal can be purchased in jars, as a dry mix, or you can prepare your own by cooking rice without salt or seasoning and pureeing it in a food processor or blender. If you choose the dry mix, the rice cereal box will have directions for mixing it in the correct proportions with either breast milk or formula for baby's first meal -- which is very diluted. As the child gets older, the cereal can be mixed into a thicker consistency.
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It is interesting to note that children who begin solid foods with rice cereal in their bottles don't learn the instinct of stopping when they are full. This is because deceptively large amounts of calories come in without much increase in volume. As a result, kids that are fed rice cereal in a bottle tend to have excessive weight gain, both as infants and later in life. Other than that, children are very good at regulating their own intake. By starting with a spoon, resting between bites, and stopping when your child is full, you will be laying an excellent foundation for good eating habits throughout his life.

http://drgreene.org/body.cfm?xyzpdqabc=0&id=21&action=detail...

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Note added at 1 hr (2007-01-13 11:10:54 GMT)
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but feel I should add:

Now it's official: breast is best for six months


Sarah Boseley, health editor
Monday May 12, 2003
The Guardian

All new mothers are to be advised to breastfeed their baby exclusively for six months before introducing solid foods under guidance from the government, announced today.

The recommendation is based on expert international opinion, but will need a big cultural and social shift if it is to be fully implemented in the UK. It merely endorses policy agreed by the World Health Assembly in May 2001, but the government has hesitated for a year before making the announcement, aware that it is taking on both cultural taboos and the commercial interests of the baby milk and baby food companies.
http://www.guardian.co.uk/uk_news/story/0,3604,953850,00.htm...

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Note added at 10 hrs (2007-01-13 20:41:37 GMT)
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The accounts suggested an impatience to move on to the next level by introducing new foods and
increasing the quantity of them. A common pattern is observed in this sample: if breastfeeding was
initiated, formula milk is perceived as the next stage; formula for hungrier babies is then introduced to
satisfy the perceived increased need; and finally a series of solid foods from rusks and baby rice to
vegetable dinners and chocolate pudding are given to satisfy the perceived need and to achieve weight
gain.


http://www.prw.le.ac.uk/research/qualquan/Shaw_CommunityPrac...