Very strange. I have a laptop running Ubuntu 8.10. While there are some minor bugs, and inconveniences, it operates relatively reliably, is fully able to suspend, screensaver etc and is a joy to use, nice on battery etc.
When I am on the road I use "Wireless broadband".
Anyway, two times in a row it froze when I parked my truck in front of a certain welding supplier called Wisco (on Western Avenue in Chicago).
First I went there to fill an acetylene bottle, found the laptop frozen with blinking keyboard LEDs, and dismissed freezing as a random bug.
Then the bottle turned out to leak through the top of the valve, so next day I took it there to replace it, and by the time I drove away, the laptop froze again!
My only guess is that someone over there runs some sort of a hostile Wifi station that crashes Linux. I am quite puzzled.