>Now that 1.5.1 is available I just found out that you CANNOT upgrade 
>from 1.5F to 1.5.1.
>Is this correct? If yes, do I need to reinstall my whole system to go to 
>1.5.1?

	actuall, 1.5F is on different branch of development, and is considered
	more ahead than 1.5.1.  you cannot "downgrade" from 1.5F to 1.5.1
	easily.  I'd suggest re-installing 1.5.1.
	http://www.netbsd.org/Releases/release-map.html

---> 1.5A -> 1.5B ->... -> 1.5F -> ... -> 1.5W
\
 \
 1.5 official release -> 1.5.1 patch release

itojun