iPhone dev Stupidity 41: drawing a shadow

From StackOverflow:

Any drawing that should be affected by the shadow setting needs to happen after

CGContextSetShadow(currentContext, CGSizeMake(-15, 20), 5);

but before

CGContextRestoreGState(currentContext);

There's also some sample code in Apple's Quartz 2D Programming Guide. Make sure you didn't draw the shadow out of the view's bounds.