Enetring ":help" in vi results in message "Sorry, help file
/usr/share/vim/doc/help.txt" not found - correct because
file is installed in /usr/doc/vim-common-5.3/doc/help.txt.
vim wants (for anything other than basic functionality) the vim-
common rpm installed, which puts an identical copy of help.txt
$ rpm -qf /usr/share/vim/doc/help.txt
ok just checked and it seems /usr/share/vim/doc mysetriously
disappeared on the machine (rpm --verify shows files as "missing").
Gotta check for intruders now :). Sorry for any hassles.