Please describe the problem:
I appear to be unable to copy either large amounts of music to my ipod (an 80gb classic I bought yesterday), or do multiple copies.
The general symptom is that when I eject, the ipod says it has no music, even though it does.

sometimes I get the following error in the terminal I ran banshee from:

[Warn  15:14:27.646] Failed to save iPod database - Object reference not set to an instance of an object (in `ipod-sharp')
  at IPod.ImageNameRecord.SetData (System.IO.Stream stream, System.Byte[] data, Int32 offset) [0x00020] in /build/buildd/ipod-sharp-0.8.0/src/PhotoDatabase.cs:748
  at IPod.ImageNameRecord.SetData (System.IO.Stream stream, System.Byte[] data) [0x00000] in /build/buildd/ipod-sharp-0.8.0/src/PhotoDatabase.cs:738
  at IPod.PhotoDatabase.SaveThumbnails (System.Collections.Generic.List`1 existingNames, System.Collections.Generic.List`1 newNames, System.Collections.Generic.List`1 removedNames, IPod.ArtworkFormat format) [0x00142] in /build/buildd/ipod-sharp-0.8.0/src/PhotoDatabase.cs:1387
  at IPod.PhotoDatabase.SaveThumbnails () [0x0009d] in /build/buildd/ipod-sharp-0.8.0/src/PhotoDatabase.cs:1308
  at IPod.PhotoDatabase.Save () [0x0003a] in /build/buildd/ipod-sharp-0.8.0/src/PhotoDatabase.cs:1101
Failed to save database (in `ipod-sharp')
  at IPod.PhotoDatabase.Save () [0x001ab] in /build/buildd/ipod-sharp-0.8.0/src/PhotoDatabase.cs:1137
  at IPod.TrackDatabase.Save () [0x0026c] in /build/buildd/ipod-sharp-0.8.0/src/TrackDatabase.cs:2562
Failed to save database (in `ipod-sharp')
  at IPod.TrackDatabase.Save () [0x00391] in /build/buildd/ipod-sharp-0.8.0/src/TrackDatabase.cs:2625
  at IPod.Device.Save () [0x0000b] in /build/buildd/ipod-sharp-0.8.0/src/Device.cs:282
  at Banshee.Dap.Ipod.IpodSource.PerformSyncThreadCycle () [0x00154] in /build/buildd/banshee-1-1.0.0/src/Dap/Banshee.Dap.Ipod/Banshee.Dap.Ipod/IpodSource.cs:510
[Debug 15:16:34.353] Unmapping DAP source (3141-5926)

I am running 1.0.0 from the ubuntu PPA

Steps to reproduce:
1. Copy entire music collection to ipod
2. Wait for copying/transcoding
3. eject ipod


Actual results:
ipod restarts and reports "No music"

Expected results:
ipod restarts and shows many aural pleasures, with shiny cover art.

Does this happen every time?
ish. It was working pretty well yesterday, but then went wrong when I used banshee 1.0.0 on a second ubuntu machine. Since then I've rm -rf'd everything on the ipod multiple times, set the FirewireGuid in SysInfo (which I didn't have to do yesterday, but thought I'd try just in case).
Earlier today I blanked it and copied 200 tracks, which worked fine. I then copied 150 more and it said No Music.
I just now blanked it again and copied all ~650 tracks on my laptop and immediately it said No Music, having printed out a number of the tracebacks given above.

Other information: