title: vim backspace leaves ^?
body: <p>In Vim, when I hit the <code>backspace</code> key in the <code>insert</code> mode, it leaves <code>^?</code> character and does not delete the character it is suppose to delete. </p>
  
  <p>I have the following in my <code>.vimrc</code></p>
  
  <pre><code>syntax on
  set number
  set expandtab
  set incsearch
  set nocompatible
  set backspace=indent,eol,start
  fixdel
  </code></pre>
  
  <p>This happens in the command mode too. When I wrongly type <code>W</code> instead of <code>w</code> to save, I press <code>backspace</code> key and it gives me the following:</p>
  
  <pre><code>:W^?
  </code></pre>
  
  <p>Any idea on whats wrong and how to fix it?!</p>
  
  <p>UPDATE: before posting this question to SO, I have done a basic google search and tried all the suggestion from the first page of search result but unsuccessful. </p>
  
  <p>@strcat I'm using vim version 7.0.237, KDE console 1.6.4, Linux 2.6.18 x86_64 machine.</p>
  
  <p>@graywh w.r.t cat -v, for delete, I get <code>^[[3~</code> and for backspace, I get <code>^?</code>. </p>
  
  <p>The output of <code>stty -a</code> is as follows </p>
  
  <pre><code>speed 38400 baud; rows 38; columns 194; line = 0;
  intr = ^C; quit = ^\; erase = ^H; kill = ^U; eof = ^D; eol = &lt;undef&gt;; eol2 = &lt;undef&gt;; swtch = &lt;undef&gt;; start = ^Q; stop = ^S; susp = ^Z; rprnt = ^R; werase = ^W; lnext = ^V; flush = ^O;
  min = 1; time = 0;
  -parenb -parodd cs8 -hupcl -cstopb cread -clocal -crtscts -cdtrdsr
  -ignbrk -brkint -ignpar -parmrk -inpck -istrip -inlcr -igncr icrnl -ixon -ixoff -iuclc -ixany -imaxbel iutf8
  opost -olcuc -ocrnl onlcr -onocr -onlret -ofill -ofdel nl0 cr0 tab0 bs0 vt0 ff0
  isig icanon iexten echo echoe echok -echonl -noflsh -xcase -tostop -echoprt echoctl echoke
  </code></pre>