When I try to open one of my files I get a message saying 'The file
'Select.xlsx' is a macro-free file, but contains macro-enabled content'. The
frames are visible but with no cell data displayed.

I have tried with macro security set to its lowest level, but upon clicking
the only option - OK - the file just closes again. The file does have a
digital signature.

Anyone come across similar things in the Beta version?