Quote - (IceDogg @ Aug 9 2007, 20:49)

The exported file is just bookmarks.html, correct? That is the normal way it's exported anyway. So, have you tried just coping the file over to your Firefox profile instead of importing it?
Here is a link to locating your profile.
Edit: I tested this to be sure..and it worked for me. If the file exported correctly this should solve the problem. If the file did not export correctly (fully) and you have already reformatted with no backups.. then there is nothing you can do, sorry.
Edit2: sorry.. Was you by any chance using one of the Alpha's that are being worked on for Firefox 3? Because they changed how bookmarks were stored.
I may have used an alpha at one point, but it would have been removed within a few minutes (was just to give it a quick go). Am I screwed now?

I can open the file fine. It opens the browser and lays out all the bookmarks. Thing is, when I import it, only half get imported, no matter which way I do it.