I have just installed avast! and it has been doing a good job. However, it has stopped my weather widget from updating itself. When i tell the widget to get the information it says it can't connect. I am using the lastest version of konfabulator with its standard weather widget. I have taken a look at the web and network shields but i can't find a section where it lists programs or processes it is blocking or where i can allow this program to do this.
avast is not a firewall and can't block access to Internet.
But WebShield is a local proxy that scans your Internet traffic. So, you need to allow it to connect.
Into the firewall settings, the following programs should be allowed to connect:
C:\Program Files\Alwil Software\Avast4\ashWebSv.exe (avast! Web Scanner)
C:\Program Files\Alwil Software\Avast4\ashMaiSv.exe (avast! e-Mail Scanner Service)
C:\Program Files\Alwil Software\Avast4\Setup\avast.setup (avast! Update executable)
Which firewall are you using? Which is your operational system?