Here's what I have from TAC: 4.9.0 upgrade has been halted for now. The upgrade has been causing issues in customer network where the CLICK function crashes intermittently. Our development team is looking into this and a sev 1 bug has been filed for the same.
Here is the bug id: CSCts58033 http://tools.cisco.com/Support/BugToolKit/search/getBugDetails.do?method=fetchBugDetails&bugId=CSCts58033 You will have to wait till the stable version come out. As of now I don't have an ETA on this.
