title: How does "cut and paste" affect character encoding and what can go wrong?
body: <p>I have a document A in encoding A displayed in tool A and a document B in encoding B displayed in tool B. If I cut and paste (part of) B into A what might be the resultant character encoding? I realise this depends on tool A and tool B and the information held in the paste buffer (which presumably can contain an encoding?) and the operating system. </p>
  
  <p>What should high-quality tools do? and in practice how many of the common tools (e.g. Word, TextPad, various IDEs, etc.) do a good job?</p>