Was Arwen At Helm's Deep?
Demosthenes @ 4:25 pm EST
Council of Elrond regular Fran recently did a bit of screencapping from a Two Towers bootleg. She discovered something interesting.

It appears that WETA missed a few shots of Arwen at Helm's Deep, and that if you look closely enough - and freezeframe an awful lot - you can probably spot her in the final charge.

Here's the proof. We think.