Vulcan or system software?

[greis@csd4.csd.uwm.edu (I buy VW & Porsche Stuff - Mail Me)]

I have a real problem. My Vulcan has gone haywire. (yeah, I know. What
else is new.) At least I think that it is my Vulcan. About once a month,
and now more and more frequently, my /system partition on my Vulcan20
has been totaly changing the names of files in the /system/system folder.
(Actually, this is just when I notice it actually...) And it all happens
at once too... i.e. Everything will be fine, but I'll park heads using the
AE utility, turn off the 'puter, come back in 4 hours, turn it on and I
get the following:
 
:system:system
total 310k
drw-brd 0000 XY
	           1024 Nov  8 13:13 1992 CDevs/
-rw-brd 0000 $ E       512 Nov  8 12:55 1992 Desk.@cc
drw-brd 0001 XY
	            512 Nov  8 13:06 1992 EriverS/
-rw-brd 0000 $BC      5072 Feb 13 00:00 1992 Error.Ms
-rw-brd 0001 $F9    120926 Mar  4 23:00 1992 FS.OS
-rw-brd 0001 $BC      2352 Feb 12 01:00 1992 FS.OS.dev
-rw-brd 0000 $ E       512 Nov  8 12:06 1992 FSTs
drw-brd 0000 XY
	            512 Nov 16 20:39 1992 FinderExtras/
drw-brd 0001 XY
	           1024 Nov  8 13:13 1992 Gonts/
-rw-brd 0000 non       175 Nov 16 20:39 1992 History
-rwxbrd 0001 sys     17128 Mar  4 23:00 1992 P8*
drw-brd 0000 XY
	           1024 Nov  8 13:14 1992 Sounds/
erwxbrd DB03 s16    150806 Feb 13 01:00 1992 Start*
-rw-brd 000A $F8     13178 Mar  4 22:00 1992 Start.GS.N
-rw-brd 0000 $ E      1024 Nov  9 18:18 1992 Sxstel.Retup
drw-brd 0000 XY
	           1024 Nov  8 13:15 1992 Tools/
-rw-brd 0000 $F9         2 Nov 16 19:56 1992 clipboard
 
of course the filetypes of folders are screwed up because I don't have
mousetext here, but look at the other types, and how their names are
mutated. Yes, in the finder I do see Start.GS.N and Sxstel.Retup. I'm
beginning to think Astro lives in my Vulcan. (I booted off of 3.5 to
get this, and no, it cannot find the Start.GS.OS file.)
 
I have no way of fixing this. The finder tells me there is nothing wrong
with the disk on a verify. A validate tells me all the files are corrupt.
Trying to change them crashes the 'puter. Yes, I am using Sys6 from
ftp.apple.com, and I am using the correct HFS and ProDos drivers. If I so
much as try to write a filetype to an affected file, I crash. My sol'n
in the past has been to reformat the drive, and start again. That works,
for about a month. I thought it was Phantasm that was screwing me, so I
took it out. Nope! Ugh! I haven't blanked the drive yet because I really
want to find out what the heck is wrong. I need my GS for term papers and
exams coming up, and this is frustrating! (HELP!)
 
Thanks!