I see the release note at
http://tools.cisco.com/Support/BugToolKit/search/getBugDetails.do?method=fetchBugDetails&bugId=CSCuj79973
Where, exactly is the description missing?
For the record, I see:
Symptom:
The URL signature string is used by the SE in upstream requests.
Conditions:
This happens only with WMT requests when CA is configured with "wmt disallowed protocol HTTP " and edge SEs don't have this configuration
Workaround:
None, unless not send url signature.
But, there still could be a problem - what URL is giving you bad/missing information?