Sleep/Display Sleep - Either one seems to interfere with Airport

If I put the system to "Sleep", or if the Screen Saver is put to sleep; upon awakening, there is a disruption of system wireless/internet connection. What could cause this?

If you are also using a Screen Saver before the Display Sleep kicks in, try setting the screen saver to Never. Does that have any effect on this wireless network connection issue?
Also, it may be useful to know if the disconnection happens when the Display Sleep starts, or when it ends. To do this, find some download that will take longer that the Display Sleep time to complete. Start the download and leave it alone. Make sure the download is still happening when Display Sleep starts. Leave it alone, in display sleep mode so that it has more than enough time to complete the download (but before the Computer Sleep setting kicks in). Did the download fail or did it complete?
Also, does this problem also occur if you manually sleep the display versus the timed (no activity) display sleep? You can manually sleep the display by setting a +Hot Corner+ to +Put Display to Sleep+, in System Preferences +Desktop & Screen Saver+ pane.

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