I’ve had this problem sporadically with iTerm on my Mac, and I seem to remember this happening recently on my Linux machines as well. If you have this problem, try this:

$ export TERM=linux

If this works, on a Mac you can set it in your .profile:

if [ "${TERM_PROGRAM}" == "iTerm.app" ]
export TERM=linux

On Linux, you can do the same, but leave out the if and just do the export line.