Mac environment, Safari, e-mail through AT&T/Yahoo. When I open an e-mail, Citrix ICA Client kicks in; tries to download "categoryhtml-aspx" and then a failure notice comes up. I have used Citrix ICA Client without incident for years to connect to work server, but I only use it then and it has never flared up like this. Also, the Citrix ICA icon appears in my dock and I cannot get rid of it. I have never had this "connection" between Citrix and anything else.