... all appeared to work but the messages are nowhere to be found ...

Are you sure about that? The imported messages may be buried several branches deep in the folder tree. Click on the little triangle to the left of a folder name to expand the tree until there are no more branches to expand:


You can also see all the folders by pressing Ctrl-Y when viewing your message list.

I imported from OE6 on an XP machine (15 or so accounts/.dbx files. They showed fine until I added accounts in livemail, at which point they all disappeared. Tried importing again, and all I get is 'imported folder 1' with no sub-directory/tree below this. I rely heavily on emails for work, and have put off switching to win7 until now for this very reason. Please don't tell me I need to sell this 1 day old machine, use xp until it dies, and switch to mac (if I'm going to lose all my dbx files anyway, I sure as **** ain't going through this rigmarole ever again)

Multiple posts tidied up for clarity