Instability on Raspberry Pi

[Sevan / Venture37]

Hi guys,
I experience hard locks on my Pi whether the system is compiling or 
extracting files.
Consistent test is running portsnap alfred.
Currently running FreeBSD 11.0-CURRENT #27 r256425: Sun Oct 13 12:42:30 
UTC 2013.
The image was built using the script from http://kernelnomicon.org/?p=275

Any pointers much appreciated on what to try next to help debug the issue.


Sevan