Newly allowed file types on talk

Talk now allows the upload of illustrator (AI) files, RDworks (rld), SVG, and VCarve (crv) files since these are file types we’re likely to want to share/upload. The max upload size is still 3MB, so limitations persist, but hopefully some folks will find it useful.

If there are other file types that would be useful to allow on talk, let me know. We do want to continue to avoid file types that could be used maliciously of course.