Re: Outlook crap
"Does Outlook mark it as a jar file? NO. It shows a nice Word icon, as it doesn't look beyond the first extension name."
Well, that certainly sounds like a bug to me. It's an elementary parsing error since the "." is valid in the filename for use other than an extension separator. For that matter, a file doesn't actually require a "." plus extension either, so that Outlook parse code is badly broken.
Biting the hand that feeds IT
