Twitter has to host those files. Pure guess here but like thunbnails, it's
not completely unresonable that they maybe want to optimize them for size to
save a few dollars on the hosting bills.

Why does it mater?

Zac Bowling

On Wed, Dec 30, 2009 at 1:27 PM, Kyle Mulka <> wrote:

> When uploading a background image, the image contents seems to get
> modified. Seems like I should be able to do an MD5 sum on the file
> before it is uploaded, upload the image to Twitter, and when I
> download the image do another MD5 sum and the two should be the same.
> But they aren't. Why?
> --
> Kyle Mulka
> Founder, Congo Labs

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