I managed to recover my file two ways:
1. I sent it to Patrick McMillan at Microsoft and he recovered it
using
a PC and he saved it to .xls 2. A buddy recovered it using iWork and
ex****ted
it to .xls, this retained more of the formatting than the previous.
Many thanks to Pat, great sup****t.
Just like chime in that I too experienced the corruption issue and was
able to recover it using the iWork im****t/ex****t functionality.
The spreadsheet in question made heavy use of conditional sums but was
otherwise fairly ordinary - no graphs, charts, enormous size, etc.
There was no prior crash/problem closing that would have been an obvious
trigger for file corruption.
The file was saved in the .xlsx format.
I hope this issue is able to be identified quickly and resolved.
