title: Delphi 2010 - Source files randomly become read-only in editor?
body: <p>Does anyone else have this problem or is my Delphi cursed somehow?</p>
  
  <p>I'll have a bunch of forms and files open in tabs in the editor and I'll be typing away and then suddenly everything stops - my .pas file has, seemingly at random, become read-only.  </p>
  
  <p>Sometimes I can just right-click the tab at the top and uncheck "Read-Only" and continue, but sometimes this option is checked and greyed-out (disabled), meaning I can't uncheck it and I can't make any further edits to the file. This too seems to be random.</p>
  
  <p>In the latter case, the only solution is to save the file in question, which works, despite Delphi's assertion that the file is read-only, close its tab in the editor, and re-open it.  Not catastrophic, really, but it's starting to become annoying.  </p>
  
  <p>Could it be that I am hitting a keyboard command combination accidentally to do this or is this a bug in Delphi? </p>
  
  <p>I'm in Delphi 2010, Windows 7.  Doubt it's anything to do with installed packages, but if anyone wants the list I'll generate it and attach it here.</p>