title: XCODE 4 to 4.2 differences when calculate etc
body: <p>After migrating from XCODE 4 to 4.2 i have quite a few problems with my applications, many of them due to my own bad code quality.</p>
  
  <p>As an example i had for some reason done two calculations looking like:</p>
  
  <blockquote>
    <p>xx = xx++</p>
  </blockquote>
  
  <p>...which worked in XCODE 4 but not in 4.2 where the compiler jumped over and did not either process or warned about it. This took me a week to find&amp;fix even if i tried to read-up on the differences between 4 and 4.2.</p>
  
  <p>Changed it to:</p>
  
  <blockquote>
    <p>xx++</p>
  </blockquote>
  
  <p>..so it works now :-)</p>
  
  <p>However, i still have problems so i wonder if someone could point me to where i can read about these type of "smaller but important" differences, which hopefully can help me track the other issues down.</p>
  
  <p>Cheers </p>