issue is that the picture is seen in the InDesign document but when you click on it there isn't a link for it.
This is intermittent. I created a new document with the same picture and it shows the link ok.
This is happening within the last 3 months and the OS (10.6.8) and CS suit (5.5) has not been upgraded in that time. The OS and Adobe updates have been run on the unit.
If the link doesn't appear in the Links panel it usually means that the image was copy and pasted from a document rather than using File>Place or dragging and dropping the file from the hard drive.
if that is not the issue then use File>Export and choose IDML for the document. Open that and save it as a new file name.
See if that clears it up.