When I double tab a number key while watching live tv (switching to channel
55 for example) a sound plays (ding!) and Media Center acts as if I pressed
the Back button. This doesn't happen with different numbers (51 for example)
and doesn't happen when I wait between pressing the two buttons. Also, it
doesn't happen for the 1 button, which I notice has no letters associated
with it. I'm guessing I got either the remote or MCE into "text" mode. How
does that work, and how do I get it out of that mode?

Another thing to note, when in menu mode with tv playing in the lower left,
the number I'm pressing shows up. The first 5 shows up, but on the second
one I hear a ding and it clears.

Can someone please help me figure out what is going on? I haven't found
this problem anywhere else on the net. Am I the only one watching channel
55? 22? 66?