I've noticed a few minor bugs myself (such as the starbase list incorrectly reporting one to be mining promethium when it's actually mining duranthium). I'll be sure to take notes the next time I see them so I can provide specifics.
Is there any way to view a saved game, one turn at a time, from the beginning? (Apologies if this is feature is available and obvious, I can be painfully blind sometimes.) I could find a lot of these bugs quickly if so, and upload the save file to dropbox with specifics on when and where they popped up.
Agreed that this is a great game and all criticism from me is intended only to help make it even better.