[Bug 18389] New: Registering after installing Roblox doesn't work

http://bugs.winehq.org/show_bug.cgi?id=18389

Summary: Registering after installing Roblox doesn't work
           Product: Wine
           Version: 1.1.20
          Platform: Other
               URL: http://wiki.roblox4linux.co.cc
        OS/Version: other
            Status: NEW
          Keywords: download
          Severity: normal
          Priority: P2
         Component: mshtml
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

After doing 'winetricks pdh' to work around bug 18388,
it takes you to a web page; clicking Register and then Over 13
takes you to a nice page where you put in your desired userid
and password.  Clicking "Sign Up!" does nothing.  On the log one sees

fixme:mshtml:nsUploadChannel_SetUploadStream Unsupported aContentType argument:
"application/json; charset=utf-8"
fixme:mshtml:nsUploadChannel_SetUploadStream Unsupported aContentType argument:
"application/x-www-form-urlencoded; charset=utf-8"

'winetricks ie6' doesn't work around the problem - it shows a blank web page.

Workaround is to go to http://www.roblox.com/ in Firefox and register there;
then you can log in in the iexplore window roblox opened up.