This post is a bit rushed and written with nano directly on the server, as I am on vacation, but when Microsoft published Comic Chat as open source yesterday they also included an era appropriate version of Comic Sans.

It's available directly in the repo, under commit f53e4b6, under "v1.0/shared/comic.ttf".

I've taken the liberty of exercising my rights under the license, and have uploaded a copy, together with the LICENSE, so you can also get a copy even if they remove it. You can download it here.

A quick legal disclaimer, so far, no statement has been made that this was done by accident, and Microsoft does own this font, so they can just release this. IANAL, but if they'd wish to claim this was an accident and that everyone should delete the files, they'd need to inform everyone - copyright law, or even contract law, does not require you to be a psychic, or second guess every license you accept, especially for something as low-value as a font from 1996.

If Microsoft wishes to contact me, the link is at the bottom of the page.