When you post a note within a SharePoint 2010 site the note is recorded against your user profile. If your IE zone settings have your My Site URL in the Internet Zone then you will be prompted for a password.
To resolve this issue add the SharePoint mysites URL to your Local Intranet zone.
>That information is well and short. keep it up more post. I thinks that SharePoint is using many more company it reaching well. Sharepoint Development