Running latest Enterprise client - all my users this morning with Acrobat 9 (Standard or Pro) reported Avast detection and removal of “C:\Program Files\Adobe\Acrobat 9.0\Acrobat\plug_ins\EScript.api”
PDF’s now either fail to load at all, or elements start missing.
I haven’t seen this yet with Adobe Reader 9, or Acrobat X or XI - but the day is young.