It occurred to me that Chapman Flack wrote in gmane.os.netbsd.devel.packages:
>
> http://bigbird.dohd.org:3021/NetBSD/pkgstat/20060622.1022/report.html
> http://bigbird.dohd.org:3021/NetBSD/pkgstat/20060622.1022/cad/qcad/.broken.html

Woah! Someone actually reads my build reports ;) Apperently there was a brief
window of about 22 hours in which the checksum was indeed wrong, and 
apperently I managed to catch it. Joerg already fixed this.