Comment 236 for bug 417757

@Laurent Yes, I was thinking the same thing since it's now fixed for me.

However, if you do some searches, even in the Ubuntu forums I think, you'll find dozens if not hundreds of posts from people saying they turned off IPV6 but still had slow lookups/connectivity. There was one thread somewhere where it was mentioned that this was due to Ubuntu/Linux now implementing some standard (I don't know which one) more rigidly than many router/switch manufacturers. That was the reason I thought to upgrade the firmware in the DI-707.

Doing a quick search I find: (3rd comment) (5th post)