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My computer says it is going to download a file with no information or name, but the Content-Type is set as text/vnd.wap.wml from http://stackoverflow.com if I am logged out. Is anybody else having the same issue?

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migrated from stackoverflow.com Apr 13 '11 at 1:08

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Same thing happened to me! –  jjnguy Apr 13 '11 at 3:19
    
Hmmm, and then I logged in, and it stopped doing it. –  jjnguy Apr 13 '11 at 3:22
    
Starts again if I log out. Odd! –  jjnguy Apr 13 '11 at 3:26
    
@jjnguy Ah, you seem to be right—I guess that's why I couldn't repro it. I've updated the question correspondingly. –  waiwai933 Apr 13 '11 at 4:20
    
what browsers and os guys –  jcolebrand Apr 13 '11 at 5:04
    
No repro. Can anyone provide more information? –  Cody Gray Apr 13 '11 at 5:08
    
@jjnguy, which browser are you using? –  YOU Apr 13 '11 at 5:14
    
@You, chrome 10 –  jjnguy Apr 13 '11 at 5:16
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Happened to me yesterday, also with Chrome. Though it was only for the homepage, navigating to any other page from the site was fine. –  quentez Apr 13 '11 at 8:39
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I saw it last night as well on Chrome and Firefox 4. Couldn't get in. –  jzd Apr 13 '11 at 10:51
    
@quentez @jzd are either of you behind a proxy? –  Zypher May 4 '11 at 23:10
    
Weird. Sounds like a proxy. –  Pëkka May 7 '11 at 9:15

1 Answer 1

This was an issue with down-level browsers requesting "text/vnd.wap.wml" via the "Accept" header. There is an IIS/ASP.NET behaviour where it tries to accomodate this (very poorly, IMO) - which is fine in principle.... unless that response happens to get cached as [OutputCache]. As a result, occasionally those results could get cached and fed to people who were expecting "text/html".

Fortunately, there was a fairly simple fix:

Make IIS not render pages as WML. Ever!

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