Well, I am no Dr, so do not have the full explanation...but from emory, it can mean one of 2 things.
1 you have a urinary infection
2 Your kidneys are showing a little distress, and are leaking protein into you urine. Like anything else, to know whatthis actually means, you need to know how much protein, and the Dr should (ifthey have time of course!!!) be looking into this. I have had this for a few years now. My actually kidney function is great, but I do leak protein. It is showing that my kidneys are not in teh best of states. I have been prescribed an ACE inhibitor, which apparently helps prevent further damage. Obviously, the best thingto prevent further damage is to make sure that you diabetes control is a good as possible. In your Drs defence, it is not uncommon for protein to be in anybodies urine..so the chances are, guessing for the your Drs responce, that there wasn't that much there, and tehy will check it again next time they see you. Don't panic...think of it as a waring sign, and make sure you do your best to control your diabetes. It is worth asking about ACE inhibitors though. I have heard that some Drs prescribe them to all T1 diabetics, as they help protect the kidneys, eveb before any damage has occured.
Obviously, I am not a Dr...and the above it what I have been told over the years from various sources.