Did your mom strain the seeds? Growing up we always had seeds in ours so it really doesn't bothter me but a lot of people won't eat them.

One of my earliest childhood memories is of my mom making (and eating) blackberry jam! I'll eat blackberries, seeds and all! They are sooo good! When we lived on our farm my DH used to pick me about 8 gallons each year and I'd freeze some and make the rest into jam. Yum