Oh my god how aggravating. I’ve got an Intel Mac mini I’m using as a server and I’ve got a StarTech USB to Ethernet adapter. Unfortunately, none of the current drivers seems to support Leopard well. Fortunately, [Sustainable Networks][1] has written a beta driver to support Leopard. Unfortunately my adapter isn’t one of the ones listed.
So far I find myself having to re-install the drivers everytime I restart the server. Fortunately this isn’t often. The latest wrinkle is that even doing this the adapter doesn’t get loaded. Crap.
After a lot of fidgeting, plugging, un-plugging, etc. I’m back online. I’ve also order the [Belkin Gigabit adapter][2] which others seem to have been using with better success.
::keeping fingers crossed::
[1]: http://www.sustworks.com/site/news_usb_ethernet.html
[2]: http://catalog.belkin.com/IWCatProductPage.process?Product_Id=281799