According to the engineers @ Gumstix, that capacitor is present for ESD reasons not for USB function.
Sorry to bug you but could I get the digikey part number for the part I am missing so I can order them today? It looks like this one but they have a bunch of similar parts:
I`m trying to track down why my USB devices are acting unreliably on my Pinto
based prototypes compared to on the Summit, and noticed a difference between
my new Pintos and photos of my old ones.
Am I missing a capacitor, and if so, could this be causing reliability
problems? I`m using the OTG port to connect to a powered hub, to which I
have a WiFi card, a 3G card, and a 4G card plugged in.
Paul Nolan, CEO Idruna Software Inc.