I’m on Android ICS (4.0.3) using ActionBarSherlock and the v4 support library. I am trying to figure out where the bottom border of the tab host is defined and can be customized/removed.

Referring to the screenshot below, I’d like to remove the bottom border for an active tab. The active tab view itself doesn’t have a bottom border, the bottom border seen on the screenshot (circled in red) seems to be coming from the underlying tabhost or somewhere. I just could not find the style or attribute to overwrite yet. The same goes for the very light, ~2-3px drop shadow that you can see beneath the tab section. Did not see where it’s defined either.
In your theme add