Compare Docuements Option - not finding the Junk characters

While comparing the PDFs (older and new document), "technique" vs "tecÚique" word, did not shows errors in Compare Docuement Option:

• The fonts are properly embedded

• While printing the pdf tecÚiqueword print tecÚique.

• While searching tecÚique word in Acrobat, the alert shows "No matches were found", but searching "technique" word it is showing tecÚique.

See the attached screen shot, and the PDF created from Adobe InDesign.

Note: This issue is not resolved in InDesign forums, but I want find the solution from Acrobat forums, Please advice for this issues (http://forums.adobe.com/message/6135769).

Thanks & Regards,

Raghu