Video Output has ceased to function

Hello,

I have frequently been using these forums as a reference, but this is the first time that I've logged in to ask a question. I've tried searching for an answer to my problem here, Google, and Stack Overflow, but I haven't encountered any threads covering this issue.

I have the current build of Raspbian with a current compiled copy of XBMC. I spent the better part of the day yesterday finishing the setup, with everything working fantastic. I was able to connect to my media smb share, add channels like youtube, and changed the skin to Quartz.

Everything was still working when I woke up this morning, but I encountered a few playback problems with certain video files. The most likely cause was codecs, so I went ahead and threw a few dollars to a good cause and received the keys within a few hours. To load the codec keys, I did the following-

sudo nano /boot/config.txt

Here I added the lines specified per instruction. Saved and exit.

sudo reboot

Now, I am seeing the normal boot sequence, and briefly see the desktop before getting a blank screen. I can VNC into the the device, where I attempt-

sudo xbmc-standalone

And still......blank screen.......

Does anybody have any idea why video has stopped working?