[tuBrains]

I am trying to add a picture watermark to a document in Word 2007, and each
time I do, it appears to work perfectly and I have no problems until I
re-open the document at which time I get an error:

------------------------
The file filename cannot be opened because there are problems with the
contents.

Details: Unspecified error
Location: Part: /word/header.xml, Line: 2, Column: 2975
------------------------

At first I thought that the image may be too large because it was getting on
for 3MB but I compressed it to 600k and it still fails and does the same with
other images too.

It's not that urgent because not having a watermark isn't the end of the
world but if anyone has any ideas they would be appreciated