What version of android do you have. I upgraded to the non root Gingerbread RRU. You know, the actual gingerbread upgrade, that might do it.
I hate to clog this thread with my troubles but I tried installing the RUU and got a USB connection error. It seems the PC I'm using doesn't want to install and recognize my phone on the computer. Now I haven't used a PC in years so I'm a bit rusty as to how to fix this. I ran the installation wizard and it failed to install.
Well I am on Liberty GB and it does force into landscape with video calls. I can receive video, but when it tries to send video, even after selecting the back camera all it sends is a blank screen and the person at the other end gets the spinning circle.
On Rooted, Liberty GB on Droid X here.