I had the exact same bug that appeared also when upgrading wheezy some years ago, and I finally get rid of it changing the TERM envvar from xterm-256color to screen-256color-bce (I use screen).
So maybe you should have a look at your TERM as well? -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
