Disable work offline in Internet Explorer 8
"I am using Windows 7, and IE8.
Often, when I have IE8 open, and I resume the computer from sleep, I get the question about working offline - even if at that moment the wireless connection is available.
This is particularly sad, because all browsing is stopped until I dismiss that dialog, that may be hidden below other windows. This is more frequent if I have GMail open in a tab, but this behavior comes from other sites as well. I suppose, GMail triggers it more often just because of its background updates."