File upload does not work in IE9 if visitor came from an e-mail link in Gmail.com
The file input field just goes blank when trying to submit the form (a basic html upload form).
How can we fix that?
Note: it occurs when you left click the e-mail link in Gmail. But if you right click and choose "Open" then the file upload works.
The problem only occurs in IE9 using gmail, not with other browsers or e-mail systems.
Example, basic html upload form:
<form method='post' action='/somepage.htm' enctype='multipart/form-data'>
<input type='file' name='filename'>
<input type='submit' value='Submit'>
</form>