Build 5.0.0.71 of xlsgen fixes how table column names containing special characters are parsed, so they are parsed correctly and written back correctly as well.
xlsgen 5.0.0.70 : Metadata in sheet duplicate scenarios
Build 5.0.0.70 of xlsgen ensures that sheet-level metadata on cells get copied on sheet duplicate scenarios. Metadata is used by Excel for dynamic formula tagging, for instance.