Loading in a Behold file and the first family is not included. Took a bit to find this one, because the Behold file was read correctly, but it was written incorrectly. The first family number was written as Family 0, but should have been 1. Fixed.
A tough bug: Loading a 2 GEDCOM Behold file worked. Then clear it. Then load it again and it crashes. This one took a fair bit of debugging. Finally found the problem. The input log sheet containing the GEDCOMs was being released (freed) from memory incorrectly. When the file was loaded the second time, Page 2 was not allocated when it should have been. Fixed.