>These happen SOMETIMES when I shift-click on UT links in order to open new windows and then close One? some? All the windows?
>I AM NOT RUNNING A PROXY SERVER. The only apparently non-standard feature in my system is that this machine is set for internet connection sharing.
>
>I use a modem to connect, my network consists of this machine, another desktop, and a laptop.
>
>I'm set to accept cookies.


I am trying to repro this on my machine. A few questions for you.
1) Does it happen when you do a normal click?
2) If you turn off internet sharing, can you still make this error happen? With or without a shift-click.
3) Does your other computer that shares the internet connection also have this error?