Came across an incident today where a user was having issues exporting bookmarks from Internet Explorer to another machine.
The export seemed to work correctly, however the import on the destination machine was slightly more difficult and displayed the error message 'Not a Valid Bookmark file'.
This is generally caused by a coding issue, and can be easily resolved by opening the bookmarks.htm file into Notepad, and changing the encoding.
To do this:
1. Open the file in Notepad (right click the file, choose open with and select Notepad)
2. Choose File and Save As
3. Edit the name for something new (in this case we have called it bookmarknew.htm)
4. Change the encoding to ANSI using the drop down box