My TiVO has stopped showing up the guide.. so I went looking for clues via ssh. I found this block in /var/log/tverr:

Jun 24 10:02:06 (none) ProgramDataUtil[16414]: Err: discontiguous station days 19447 -> 19449
Jun 24 10:02:23 (none) last message repeated 3 times
Jun 24 10:04:20 (none) DbLoad[16414]: Failure: minAvail = 65395, availAppBlock = 64168
Jun 24 10:04:20 (none) db[16414]: DbLoader Unpack=/var/packages/006:00001_19529-19532.snow.bnd: Error Processing TvStatus=0x3001d
Jun 24 10:04:20 (none) db[16414]: DbLoader DbLoad failed to process file=/var/packages/006:00001_19529-19532.snow.bnd err=x3001d
Jun 24 10:04:20 (none) avalPP[16414]: DBLoad Failed with errcode x3001d!
Jun 24 10:04:20 (none) avalPP[16414]: StartDirectory failed, returned error <0x3001d>
Jun 24 10:04:20 (none) Call[16414]: Err: TvStatus=0x3001d ProcessQueue failed
Jun 24 10:04:20 (none) CallService[16414]: Err: TvStatus=0x3001d Postprocessing failed

When I look in /var/packages:

S3-tivo/var/log $ ls -al /var/packages/
total 2
drwxr-xr-x 2 0 0 1024 Jun 25 00:30 .
drwxr-xr-x 14 0 0 1024 Jan 2 1970 ..

Is that normal?

I'm guessing this is "OzTivo":
Jun 18 08:13:21 (none) Stats: !! Computed SHA1 doesn't match stored SHA1 !! Computed SHA1: 0x16CC41CDDCAA8F01218B7C4C6640F0F314277422 Stored SHA1: 0x6BC6DBF6883AC1F826C25DEF79B2FC6C209AA3

In /var/log/tclient there's a bunch of entries about db loading reporting errors, with the last one looking like this:
Jun 25 00:30:24 (none) db[18768]: DbLoader Process Unpack=/var/packages/006:00001_19529-19532.snow.bnd
Jun 25 00:30:24 (none) db[18768]: DbLoader Unpack=/var/packages/006:00001_19529-19532.snow.bnd: Processing TvStatus=0x3001d
Jun 25 00:30:24 (none) db[18768]: DbLoader FinishedLoading(Unpack=/var/packages/006:00001_19529-19532.snow.bnd): nAction=0/0 nBatch=0 nBatchTrans=0 nproc=0 item#=0 id=(NULL) ty=0
Jun 25 00:30:24 (none) db[18768]: DbLoader Unpack=/var/packages/006:00001_19529-19532.snow.bnd: Error Processing TvStatus=0x3001d
Jun 25 00:30:24 (none) db[18768]: DbLoader DbLoad failed to process file=/var/packages/006:00001_19529-19532.snow.bnd err=x3001d
Jun 25 00:30:24 (none) avalPP[18768]: DBLoad Failed with errcode x3001d!