Esmi,
Thanks for your continuing responses. Unfortunately none of the above worked.
I reset my permalinks to a custom but preset structure and deleted the .htaccess file. (/%year%/%monthnum%/%postname%/) The link still does not display the attachment ID.
It shows: https://sudobeautify.com/2011/05/eos-dollyeye-blue-review/deb1/ for the attachment page (this link won’t work at the time of this reply as i’m reverting back to the pretty permalinks.)
Deactivating my plugins did not resolve the issue.
Changing to the twenty ten theme did not resolve the issue.
I’ve reset the plugins folder and this too did not resolve the issue.
As I said – I want to maintain the pretty structure with the postname only so reverting to the default isn’t so much an option as it will be my last resort.