As I mentioned previously, I spend a fair bit of time on the command line in OSX, usually SSH’d to another machine. I found it rather irksome that, after the upgrade to OSX 10.7 (Lion), as I moved around and deleted text in nano while SSH’d to a Linux box, the text would skip and not show the right output. Did some quick googling and found this page, which has the solution. If that fixes your issue, let them know by dropping them a comment! Here’s the solution:
I noticed using Terminal to connect via SSH to an IPv6 server and opening a file with nano, character repeats and skipping of the display when pressing and holding backspace or when typing rapidly. This is only new since I installed OS X 10.7 Lion. I seem to have solved the issue by going into Preferences for Terminal.app and selecting the Advanced tab and changing Declare terminal as: to xterm-color from xterm256-color.