@Laurent Ok, I spent some more time researching this, playing with various scenarios.
1. Fedore Core 12 running in VMWare exhibits the same problem as Ubuntu 9.10 running natively. 2. WinXP running in VMWare does /not/ exhibit the problem. 3. Cent OS 5.4 running in VMWare does exhibit the problem. Something I was not expecting. 4. Ubuntu 8.04 did /not/ exhibit this problem. It started with 8.10 and appeared to be much worse in 9.10. Based on some discussions that I remember reading (but no longer have a link to) I decided to try to upgrade the firmware on my DLink 707 firewall gadget to version 2.57 from version 2.51. It's too early to tell for sure, but my initial feeling is that network performance is much improved. My standard test of loading multiple large pages simultaneously is not causing the problem. If this turns out to be the "fix", the question would be why did Ubuntu 8.04 work flawlessly and later versions have problems? -- [karmic regression] all network apps / browsers suffer from multi-second delays by default due to IPv6 DNS lookups https://bugs.launchpad.net/bugs/417757 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs