Some bugs need help to be fixed. There is a  full list with the NetBSD bugs in netbsd.org.Some of them are critical for work of the operation system and have to be fixed as soon as possible.Now this site make effort to fix some of them.
Here are folowing links with discription of these bugs.

X server crash leaves machine in hung state.
Not available for now
gzip erroneously indicates total failure on 4GB archives
Not available for now