title: control-b: is it reserved?
body: <p>I was surprised when a function that I wrote in python/tkinter and binded to Ctrl-b behaved strangely (specific: it was losing the value of the selected text, so that text.index(SEL_FIRST) was undefined).</p>
  
  <p>I was surprised when, after changing the more improbable things I binded it instead to something else - and it worked!</p>
  
  <p>I searched but didnt find anything: is Control-b binded to something default in tkinter???</p>
  
  <p>alessandro</p>