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A number of users have noticed that after installing the Mac OS X 10.5.6 update, their cookies seem to have disappeared.
Remove and add back one-by-one.
Do things Google Docs and Spreadsheets can't do with gDocsBar.
Leopard users get the added bonus of Wikipedia as part of the dictionary app. They're also getting Web history search via Spotlight.
Webwag is another single page aggregation service. Is it worth using? Yes, but maybe not instead of some of the big guys.