How to disable the new item icon in SharePoint / MOSS
Whenever a new item is added to a list, a small icon shows up that says that this item is new.
If you want to disable this, or change how many days this should be displayed, you can do this from stsadm using this command:
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stsadm.exe -o setproperty -pn days-to-show-new-icon -pv 0 -url [Your Virtual Server's URL]
Source: Microsoft KB 825510
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