Tux I have not filed any tickets for Spreadsheet::ParseXLSX as you well know since I am not on the list, but my personal reason for not using Spreadsheet::ParseXLSX is it's dependency on XML::Twig. I see that you do file tickets against Spreadsheet::ParseXLSX and I applaud that. As a fellow module author I think we both know how much that is appreciated.

The XML::Twig segfault issue was already filed as ticket #20 then closed as un-reproduce-able by the author (not fixed). Since it was a perl bug and not an XML::Twig bug or a Spreadsheet::ParseXLSX bug is it a bug or just a design choice? (choice is good) Other than that Spreadsheet::ParseXLSX emulates Spreadsheet::ParseExcel mostly seamlessly and very well.

I have chosen not to file the chartsheet bug on Spreadsheet::ParseXLSX because I am only peripherally aware of the possibility. I heard of it because it was filed against the Spreadsheet parser I maintain. I have been fairly busy and have not done the necessary validation work to write up a solid issue for doy. I would invite you to work up the validation of the chartsheet fail and file an issue if you feel passionate about it.