Hi all, under Apache 1.3 with mod_perl, I dynamically set the header calling 
...
$r->headers_out("Content-Disposition",$my_value);
return OK
...

[download]
It works. The header name is sent in lowercased form ('content-disposition'), which is correct considering HTTP spec. But I suspect end-user's Symbian 3rd edition that it ignores this lowercased version - it downloads the content and saves it somewhere, but it does not start installation.

Is it possible to set the header name without lowercasing?

In reply to Uppercase HTTP Headers by pajout

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