curl -I http://blog.l0b0.net/wp-content/uploads/2007/09/dvorak-keyboard-layout-at-login.reg
HTTP/1.1 200 OK
Date: Tue, 25 Sep 2007 10:36:05 GMT
Server: Apache
Last-Modified: Tue, 25 Sep 2007 09:30:35 GMT
ETag: "248c6cd-491-63a384c0"
Accept-Ranges: bytes
Content-Length: 1169
Content-Type: text/plain

I guess your PC has associated .reg files with a MP3 player though?

I’ve also downloaded the file, and re-set the encoding to ISO-8859-1. According to jEdit, it was set to “x-UTF-16LE-BOM”.

Still doesn’t work. Any ideas where the MIME type is overridden?

Sure, look at the bottom of this post. I’ve tried it on two machines now, and both detect it as MP3.

Yep appears as MP3 to me.

Looking at the headers returned by your webserver - it is stating that it is MP3 so it looks like a server config issue I think:

$ curl -I http://blog.l0b0.net/wp-content/uploads/2007/09/dvorak-keyboard-layout-at-login.reg
HTTP/1.1 200 OK
Date: Mon, 10 Sep 2007 18:24:39 GMT
Server: Apache
Last-Modified: Mon, 10 Sep 2007 14:04:24 GMT
ETag: "248c6cd-886-77438a00"
Accept-Ranges: bytes
Content-Length: 2182
Content-Type: audio/mpeg

Interestingly, the unix file command (which helps identify file types) says this about the file - MPEG ADTS, layer I, v1, 160 kBits, 48 kHz, Stereo - I guess your server config maybe using file to determine the mime type automatically.

I tried deleting all MIME-config entries, and the file itself, and then upload the file again. It didn’t help. It’s still downloaded as an MP3 file. I also tried changing functions.php (to include “reg” with the text/plain formats), and uninstalling MIME-config before uploading again, but it seems to be completely broken. Any tips would be great.

Ok. It sounds like your server is configured to return a mime-type of MP3 for .reg files and as such that is what is being returned.

The list of mime-types in WordPress (and hence in the plugin) affects what you can upload to the server - it is effectively a whitelist of allowable file types - the mime-type info is stored along with the extension so as to be available when WordPress or a plugin wants to do something special based on mime-type - at present the only mime-types that WordPress does anything special with on presentation is images - where is extras the width and height to put into the generated html.

In the admin panel you can delete individual entries. Therefore you should be able to delete the entry for .reg files and then create a new one that is correct.

I tried deleting all MIME-config entries, and the file itself, and then upload the file again. It didn’t help. It’s still downloaded as an MP3 file. I also tried changing functions.php (to include “reg” with the text/plain formats), and uninstalling MIME-config before uploading again, but it seems to be completely broken. Any tips would be great.

I’ve tried to use v0.90 with WP 2.2.1, and it failed to register reg (Windows registry) files properly as text/plain. Now the reported MIME type is MP3. Is there any way to fix this?

In the admin panel you can delete individual entries. Therefore you should be able to delete the entry for .reg files and then create a new one that is correct.