Android Browser File Types

So far there are reports that specific types of files fail to download on
the Android browser. Here is a list of known file types:

Extensions
.zip - fails Note:1: The content being downloaded is not supported by the
phone .xxx - works Note:2: Most .zip files on this site that should be
downloaded via G1 have this extensions with instructions on renaming

Notes
.xxx gets renamed to .asc when downloaded via the browser.
while .zip results in the "content not supported" message, .ZIP (uppercase)
does work (tested on Android 2.1, Moto Defy)

Download Crutch
An application has been added to the market that will allow you to download
any file. I have tested it with a .zip file and it worked great. The app
name is Download Crutch. Find it on the market if you need to download any
non working file extension.

Astro File Manager
In edition to Download Crutch there is another free market app that
addresses this isue. Astro file manager will enable the browser to download
all file types. Astro is one of the highest rated and most popular file
managers in the Android Market. To allow the browser to download all file
types using Astro, download and open Astro File Manager. Then press menu,
select more, then at the bottom of the list select the box marked Enable All
File Types in Browser. In my experience, Astro is a good way to solve this
issue as it is a very good file manager in addition to enhancing the
browsers functionality.

HTTP Headers
If you are writing a web applicatoin that creates downloadable content,
watch your HTTP headers to make your downloads work on all (and especially
older) Android versions as expected:
set the ContentType to application/octet-stream
put the Content-Disposition filename value in double quotes
if your file is a ZIP: write the Content-Disposition filename extension in
UPPERCASE