Hello Jitsi Community,
I was going to report this as a bug on JIRA, but the Jitsi website steered me this direction. I think this is a simple bug. I also searched on JIRA for a similar issue but did not find one.
I am running Jitsi nightly from Feb 1, 2012 (build 3884) on Mac OSX (Snow Leopard). When going to the Jitsi Options, then selecting Video, then "More settings", there is a drop-down box that allows selecting the Video resolution. The default value is "Auto", but there are several other choices. I attempted to run a video call at 1280x720, but the resulting video was stretched to be very tall and narrow. Suspecting that the height and width were reversed, I edited the file $HOME/Library/Application Support/Jitsi/sip-communicator.properties and found these two lines:
Even though those two lines look correct, I tried reversing them so they looked like this:
After restarting Jitsi the video appeared correctly.