CFCONTENT not working correctly with CF11 and IE10

I have a very simple which is working in CF8 using IE10

<CFHEADER NAME="Content-Disposition" VALUE="inline; filename=sammy.jpg">

<CFCONTENT TYPE="application/unknown"

    DELETEFILE="No"

    FILE="c:\inetpub\mysite\sammy.jpg"

  reset="Yes">

I recently upgraded to CF11 and now the same code is not working on IE10, but amusingly it is working in Chrome and Firefox.

Any clue?