After I installed the last updates yesterday, I (again) had the problem that my wireless didn't work. I always had to use madwifi to get it working, and still hadn't gotten the grasp of how exactly I got things to work. After doing some research on the internet, I read somewhere that a newer kernel version did support my wifi-card. So I updated to a newer kernel version.
After the kernel update, I can scan for wireless networks, and it says I'm connected to my network.
But... When I try to go on the internet it keeps saying I'm not connected. I can't ping websites either. What I can do is connect to my router and ping my router. With other devices I can go online wireless, so I think the problem is in my configuration in ubuntu.
I'm not at home right now, so I can't give you the output of iwconfig, ifconfig etc. But if you tell me which commands would be of help to you, I'll put them online in a couple of hours.
I really hope someone can help me with my wireless problem!