[CentOS] vim helpfile tag issues

Just wondering if anyone can replicate this issue....

On CentOS 5.2, using vim 7.0.237, I'm having a consistent issue across
all my centos boxen.

if I try and access the help files direct (as root), such as ":help
tutor" I get:

"usr_01.txt.gz" [readonly][noeol][converted] 11L, 4393C
E434: Can't find tag pattern
Press ENTER or type command to continue

If I press enter, it shows me what appears to be the output of a binary.

looking at that top line, it appears as if the help files are
compressed, and it can't read the tags within them. Is there a satellite
package I need to unpack or enable the ability for vim to decipher
these?

If I just type ":help" the status line reads:

"help.txt" [readonly] 214L, 7883C

which is ok, and the text file is displayed correctly.

Under Fedora 9, doing a ":help tutor" works correctly, and the status
line reads:

"usr_01.txt.gz" [readonly][noeol] 11L, 2914C

Note the different tag on the centos boxen "[converted]"..

Also, /usr/share/vim/vimxx/doc/ seem to be pretty similar (given that
Fed9 is vim7.1 and CentOS is 7.0).... even the tags file looks ok on
both ends:

Fed9:
$ grep  tutor tags
sql-completion-tutorial sql.txt.gz      /*sql-completion-tutorial*
tutor   usr_01.txt.gz   /*tutor*
vimtutor        usr_01.txt.gz   /*vimtutor*


CentOS 5.2:
# grep tutor tags
sql-completion-tutorial sql.txt.gz      /*sql-completion-tutorial*
tutor   usr_01.txt.gz   /*tutor*
vimtutor        usr_01.txt.gz   /*vimtutor*


-- 
Spiro Harvey                  Knossos Networks Ltd
021-295-1923                    www.knossos.net.nz
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