I noticed that after everytime I use wvdial to connect to the Internet through a 3G dongle, any attempts to connect to the Internet thereafter would fail. After looking around a bit, I realized that I could connect as a root, however a normal user could not.

more /etc/resolv.conf

results in a 'permission denied' error. If I manually enable 'read' for group as well as other users (root permissions do not change), then I can connect again.

Turns out everything is fine till the point wvdial establishes connection. You can browse, et al. When you hit CTRL+C on wvdial to disconnect, permissions for resolv.conf changes to root(rwx) and nothing for everyone else.

I did not see this problem with stable (I'm using the latest cooking).