Build 3.0.0.78 of xlsgen fixes a problem related to the internally calculated size of inserted pictures.

For XLS files, a y scaling improves the general layout of inserted pictures.

For XLSX files, both x and y scalings are changed in order to take into account the realities of the XLSX file format, where picture (and other objects such as vector shapes) offsets are written using a different unit scale than XLS files. The corresponding algorithm in Excel 2007/2010/2013 remains undocumented. xlsgen reverse engineers this algorithm.