I swear Ubuntu networking is broken somehow, and for the life of me, I can't figure it out.
Back on my old laptop I have Ubuntu 7.10 and a Dlink wireless card that uses the Atheros madwifi drivers. No matter what I try, large downloads in firefox/wget/fetch, etc just hang. The bitrate starts our grap, then nose dives into nothing. Same goes for uploads to Flickr. If I implement rate limiting on the upload, or on the downloads using the --limit-rate in wget, if works, and stays working.
This happened when I connect to either of my two wireless routers. Never a problem on XP.
Now that I have the new Macbook pro, I'm running Parallels and an instance of Ubuntu 7.10, which now sees network as a Realtek wired connection. Yet again, large downloads bitrate nosedives, then hangs. Of course, downloads in OSX, and XP and even FreeBSD on the same book speed along just dandy without these sorts of problems.
In a nutshell, what in the hell is going on here? I have no idea, and any posts to the Ubuntu forums go unanswered.
What an oddball issue.