mururoa
On the photo of the card, it seems that the chip is dlink...
but it is actually realtek. This is the thing I dislike.
I had dfe-530 (it is 100mbits) and it was with via chipset if I remember correct. Actually I was very satisfied with it...
However, I often see posts in maillisting about issues with re driver which you should use. It seems that there is active development for re driver in -stable and -current ... You should consider it too