This might not strictly be a bug – more a choice by Apple / Web kit over compliance, anyway…

I noticed this issue in Safari, my primary browser, (Firefox doesn’t exhibit the same problem) while downloading a file from a system I wrote. The system uses content disposition. When you click to download the file, Safari retreives the file and saves it to disk with the correct name. If you right click and ‘Download Linked File As …’, it seems to ignore the suggested filename and uses the end part of the URL, excluding the query string (everything after and including ‘?…’).

This is not the first time Safari has stumbled. An internal indexing system at work uses prototype to submit forms (so we can chain event handlers on submit). The forms themselves (maybe incorrectly?) do not specify action or onSubmit attributes. Safari can’t submit these forms, Firefox doesn’t have a problem and works. </grumble>