I found during the end of 2nd tri and the the 3rd trimester I was having big breakfasts. I wouldn't worry too much if you're eating more morning & lunch, coz that's the best time of day to be eating anyway. You're more likely to put on weight if you eat and then go to sleep for the night.

Kazbah - I haven't upped my diet for breastfeeding. I just eat when I'm hungry hehe. But my meals seem to be fairly normal and what they were before.