Pressing key 'T' prints 7 in VIM 7.4

Hello!

I am pretty noob to VIM. Actually just started using it from yesterday only!

I am experiencing an odd behavior in VIM. Whenever I press key 'T' it prints 7 on the screen like a leetspeak. But the key 'T' works fine in other applications like gedit/firefox etc. So clearly not a keyboard problem. How do I rectify this problem as I am not able to use any of the :set commands.

Here is my .vimrc (Actually just yanked the example vimrc shipped with VIM) :
http://hastebin.com/jasutanele.dos

BTW I am using Ubuntu 13.10 x86_64.

Thanks!

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