The GF bought her iPhone 2G years ago from the US (we live in the UK) and as such had to jailbreak it to use it in the UK.
She updated the phone with itunes at somepoint a while ago and 'undid' the jailbreak (although it still works with a UK sim).
As such, from the date she updated, the Carema Roll seems to have created seperate files for photo's post her updating. Windows can see the photo's post the update, but the not those prior to the update. The photo's prior to the update are still visible on the phone.
iTunes cannot locate these photos (>600) and I have also tried "diskaid" but as iTunes, it can only see the photo's that are visible in windows explorer.