this line in spreadsheet.js (510):
rows[r][c] = util.gcell2cell(cell, options.getValues, _this.opts.useCellTextValues);
the second parameter should be:
_this.opts.getValues
corrected line:
rows[r][c] = util.gcell2cell(cell, _this.opts.getValues, _this.opts.useCellTextValues);
I love this module. Thanks!