install/40718: UFS DATA DESTROYED when I installing onto other partition, same disk!!!

[mustelator%yahoo.es@localhost]

>Number:         40718
>Category:       install
>Synopsis:       UFS DATA DESTROYED when I installing onto other partition, 
>same disk!!!
>Confidential:   no
>Severity:       critical
>Priority:       medium
>Responsible:    install-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Feb 22 23:35:00 +0000 2009
>Originator:     Toni
>Release:        4.0.1
>Organization:
N/D
>Environment:
amd64, Athlon64 6000+, 4GB DDRII Dual Channel, HDD Seagate SATAII 500GB. kernel 
i386.
>Description:
The installation in a new partition (2nd), being first UFS with freebsd and 
others ext2fs/msdosfs in extended partition,  ERASE ALL MY FREEBSD LABELS!!!!! 
on the netbsd installation, I select no touch MBR boot (work the freebsd ok), 
and when it's finished, the F1 option (freebsd) don't work, but F2 (netbsd) 
yes. When I try to init installation from freebsd to check the UFS labels, all 
labels (and data) is deleted, but no slice! No alerts for overwriting data.

And it delete my ufs slice labels AND DATA from company pc too!!!

It's not a joke.
>How-To-Repeat:
In all cases, installing into same disk with freebsd.
>Fix: