Taxonomy gets imported flat when line breaks included

Taxonomy XML exports a file with no line breaks, which makes it extremely difficult to human read. Since the purpose of doing the export was to translate all the terms and load back in a different language, I put line breaks between the XML tags to make it more human-readable.

As a result, when I came to load the vocabulary file back in, everything loaded ok except that the hierarchy between child and parent terms was lost and I ended up with a flat hierarchy.

Workaround: use an XML editor that gives you a nice presentation without mucking up the structure! I found one called XML Fox Advance which I rather like, if you don't mind installing a wadge of MS .NET stuff on your workstation.