Perhaps it's disk utility or virus detection software, as the previous poster postulated. On the other hand it could be some other third party application. Is the Apple Menu always flashing or only during certain events? If you have quit all applications and just have the Finder open while the menu blinks, it must be an INIT. You may wish to seach your Extensions or Control Panels folders (inside of System Folder) for any items with the icon in question. Once you find the particular application responsible, you can drag it and any of its associated files to the desktop, and then you should restart. Alternatively, you can use the Extensions Manager (control panel) to find the culprit. Feel free to ask for additional help if you can't solve the issue.
<small>[ 07-17-2002, 11:45 PM: Message edited by: Big Mac ]</small>