I'm just about through with this theme. It breaks very badly during upgrade (erasing all my sidebar widgets) and it spontaneously self-destructed on 12/28. First warning I had of this was visiting my blog a few days later only to find a blank page. When I logged into the admin, it said my theme was missing. I checked the themes page and Tiga wasn't there anymore. I had to reinstall Tiga and re-configure all of my header/CSS and sidebar options. I'm through messing with this HIGHLY unreliable theme.