when opening example1.xlsx file in Excel2007 it says that "Excel found unreadable content in 'example1.xlsx'. Do you want to recover the contents of....". I tried to see what was going on under the hood and found that removing <cols> part from document reduces errors to just one, but this I can't shake no matter what I try. I operate in Windows. Probably some minor detail is wrong. Open Office seems to handle it without errors, but it would be nice to be able open then in MSExcell as well.
I'll appreciate any input on this