* Here is a slick method to do it through Javascript on Linux. Create a new text file called (for instance) reload.js and put it into the directory:

     ~/.adobe/Acrobat/8.0/JavaScripts/

  *  In the text file write these lines:

     reloadCurrentDoc = app.trustedFunction(
     function(currentDoc) {
     app.beginPriv();
     currentDocView=currentDoc.viewState;
     currentDocPath=currentDoc.path;
     currentDoc.closeDoc();
     currentDoc=app.openDoc(currentDocPath);
     currentDoc.viewState=currentDocView;
     app.endPriv();
     });
     
     app.addMenuItem({
     cName: "reloadCurDoc",
     cUser: "Reload",
     cParent: "File",
     cExec: "reloadCurrentDoc(event.target);",
     cEnable: "event.rc = (event.target != null);",
     nPos: 0
     });
     
     app.addToolButton({
     cName: "reloadCurDoc",
     cExec: "reloadCurrentDoc(event.target);",
     cToolText: "Reload the current document",
     cEnable: "event.rc = (event.target != null);",
     cLabel: "Reload",
     nPos: -1
     });



  * Close and open Acrobat. A toolbox item called 'Reload' appears and a corresponding menu item in the 'File' menu is added.

  * NOTE: On Ubuntu, remember to install the acrobat-plugins package from the medibuntu repository.

  * Credit to Alexander Grahn for the idea http://www.tug.org/pipermail/pdftex/2009-January/007934.html