Those look like incorrect code page errors, though I'm not sure that such things really exist in Linux.
What language do you use in Vector? And how is it set in /etc/profile.d/lang.sh?
While it may not be related, I had some problems with man under Vector as well. I ended up installing most as a replacement for less, then setting up an alias in ~/.bashrc that goes like this:
man="man -P most"
Since using that, I've not seen the problem repeated.
I don't know if there is a Vector build of most, but the Zenwalk version works fine under Vector. It can be found here if you want to try it:http://www.users.waitrose.com/~paulm/files/most/most-5.0.0a-i486-50.1.tgz
There is also a Slackware build - that was what Zenwalk was using before I built version 5.0.0a.