ky331
5
I can confirm an intermittent NETWORK ERROR when trying to open some (but not all) YAHOO MAIL messages, when AOS add-on is enabled in IE 11.
In my case, avast 2014 build 2018, free, on Win7x64 Pro SP1.
(I have not had any problem with the AOL add-on in FF.)
I previously reported my findings here: http://forum.avast.com/index.php?topic=149104.msg1084538#msg1084538