Event export file isn't Mac friendly

I was having trouble opening the exported .ics file from Events+ on several Macs. When I opened it in an editor, I saw the file started with two blank lines, as shown below:

BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//hacksw/handcal//NONSGML v1.0//EN
BEGIN:VEVENT
...

If I remove those two blank lines and save, it imports just fine.