Do you get "Unknown Error" page when you try to access "Manage Links" page from "My Links"? Don't panic.
Many people experienced the same problem after Microsoft Office SharePoint Server SP1 update. The problem was confirmed by Microsoft and hotfix for it has been around for awhile (KB 952294).
Microsoft Help and Support:
You do not have the Create Personal Site permissions in SharePoint Server 2007 Service Pack 1. When you click the Manage Links link, you may receive the following error message:
An unknown error has occurred.
If you are looking for a quick fix, I recommend you go view and request hotfix package from Microsoft. But if you really want to customize Manage Links redirecting URL, in next post I'll show you how to do it without making any changes to master page.
Watch this space