Terminal problem with Ctrl + Arrow and Shift + Arrow keys
The same thing happens on my 10.9 and 10.8 VMs. Control-arrows and shift-arrows don't do anything by default in bash. Where were you even using shift-arrows to select text? emacs or vim?

If you want to use control-left and control-right to move between words in bash, add these lines to ~/.inputrc:

"\e[1;5C": forward-word
"\e[1;5D": backward-word


To use shift-arrows in Emacs, map shift-up to \e[1;2A, shift-down to \e[1;2B, shift-right to \e[1;2C, and shift-left to \e[1;2D. If pressing shift-up results in a message like &lt;select&gt; is undefined, try setting TERM to xterm-vt220.