In the commentary, J. Michael Straczynski relates some trivia, namely that Ivanova's stat-bar is mixed both gold and silver to mark her rank as Lieutenant Commander, and that full Commanders and above have solid gold stat-bars (assuming they're not in Security or Medical, which are green or red respectively). However, in Revelations (1994), Ivanova was promoted to a full Commander by Sheridan, so Ivanova's stat-bar was incorrect for the remainder of her time on Babylon 5, at least until Sheridan promoted her to Captain in Rising Star (1997).
As the Babylon fighters are escorting the Narn ship through the jump-gate, one of the upper ships can be seen to disappear instead of entering.