I installed the first generation Time Capsule a few months ago and set up WiFi access. It has been working fine until this weekend. Now I am frequently getting a message that I am not connected to the internet when I open Safari, especially if the computer has gone to sleep for awhile. I am running Mac OS X Version 10.7.3 and Safari version 5.1.3. Can anyone help me out?

I installed the first generation Time Capsule a few months ago and set up WiFi access. It has been working fine until this weekend. Now I am frequently getting a message that I am not connected to the internet when I open Safari, especially if the computer has gone to sleep for awhile. I am running Mac OS X Version 10.7.3 and Safari version 5.1.3. Can anyone help me out?
You are not alone. Long thread on Macs not connecting to Internet after waking from sleep over on Apple support forums. I've only had it 3 times and in my case got it working by turning wireless off then on, but others have various other workarounds. Seems like something Apple needs to fix.

I installed the first generation Time Capsule a few months ago and set up WiFi access. It has been working fine until this weekend. Now I am frequently getting a message that I am not connected to the internet when I open Safari, especially if the computer has gone to sleep for awhile. I am running Mac OS X Version 10.7.3 and Safari version 5.1.3. Can anyone help me out?

It is a known bug that was supposed to be fixed with 10.7.3 but like you have found out it still hasn't resolved the issue. Just go to the wifi symbol and select your connection.