It's purely the version. I just tried opening the same copy of the file in both v4 and v5 - v4 had all kinds of gibberish, v5 was fine!
I'd suggest upgrading, it's a much nicer interface anyway!
Jon
"There are worlds out there where the sky is burning, where the sea is asleep and the rivers dream; people made of smoke and cities made of song.
Somewhere there's danger, somewhere there's injustice, and somewhere else the tea is getting cold. Come on, Ace, we've got work to do."
THE DOCTOR, "Survival" (Doctor Who)