If you create an xla (or xlam) file in Excel 2007 and add a VBA project
reference to Solver.XLAM using Tools-References, the xla (or xlam) file will
crash Excel when it is loaded. You must also add a VBA module (e.g.,
Module1) to the addin and place a dummy routine in the module such as:

Sub Test()
End Sub

Has anyone else experienced this problem with Excel 2007?