Not sure if this is a new one or not...
When loading the character screen for the first time each session, the Federation and Klingon backgrounds load at the same time. You wind up with parts of the Klingon screen showing through the Fed one (looks hysterical to see the Klingon symbol at the base of a Fed transporter pad!) while the server is connecting.
I've tried to get a screenie, but apparently FRAPS isn't playing nice with STO at the moment
Comments
If you research the bug reporting thread a bit, you'll see that bug has been mentioned many times.