I'm using the Darklets theme, made a few adjustments and uploaded the base.css via FTP while in dev mode, and it put the default header image back, and all my text colors back to default. So I went in the admin "Edit Theme" section to re-upload my header image, and it did not apply it. It won't apply any edits through the site admin on the theme.

I just moved the site to a new host/server, so I'm thinking maybe a permissions issue?

Any suggestions?