title: Excel Solver not obeying binary constraint
body: <p>I created a model in Excel to use in conjunction with Solver. It mostly works. The only problem is that Solver is not really treating the cells constrained as binary properly. When it's done finding a solution, some of the numbers are actually 0.9999996, 1.0000000003, 0.0000017, and so on.</p>
  
  <p>I am using Excel 2004 on Mac OS X. Any ideas?</p>