I have TL-WDN4800 and it works great. I have tested this on Mint 15 and 16, both 64-bit cinnamons. I think that if you have problems with Atheros, it is because your Mint is so damn old. I'm about to buy this WDN3800 to my other computer, i'll test it out once it arrives. And by the way, i haven't set anything up, i plugged my WDN4800 in my motherboard and booted up and connected to ethernet. Haven't done anything else. 4800 uses AR9380 chipset, but same driver.
As tejo below confirmes also, WDN3800 works. I have been testing this now for almost couple of weeks, and both, TL-WDN3800 and TL-WDN4800 work very well. Actually, because both computers are dual boot, I would not hesitate to argue that they work better on Linux than Windows. They work on both, but on Windows they sometimes lose connection easily, but on Linux both work like there would be cable coming to computer. Like a charm really.
I actually got here first place because I was googling if these work on Linux, and if there are some people who are thinking same as me, yes they work. If they dont, your Linux is too old. These work because of a driver in kernel, which means that whatever Linux you are running, it should work if the kernel is relatively new.
I have also found this site: http://www.linux-hardware-guide.com/
There you can find information what works and what doesn't on up-to-date distributions.