Try checking: id
See if the uid is the same on other installs.
Running id revealed the source of the problem. On all my other systems, the first user account I create is my own and all of them have UID of 1000 and GID of 1000. On SOHO b2.1 I created my own user account first, as usual, but the UID and GID were 1001. That, of course, causes copying to or from SOHO from my other Vector installations to not work and I get a permission denied.
I wanted to change my ID numbers to 1000 but VASM doesn't offer that option and neither could I find it in KDE. So once again, Google was my friend. As root, I edited /etc/passwd and /etc/group and changed the numbers to 1000. I was then able to copy stuff from my home directory on another VL installation.
I hope this will be changed so that the first user created is 1000. If not, it will create minor havoc when the user tries to copy from the same user's home directory on another VL. I usually create a visitor account second and one for my husband third, but I haven't gotten around to that yet. I'll be curious to see whether those numbers are also messed up. Visitor should be 1001.
Thanks for the tip.