Recently I've had a few documents that I've needed to convert from .odt to .pdf formats and naturally I use the "Export to PDF" option in the File menu. The exporting works just fine, creating a PDF document just like I'd expect, but then when I go back to the original document all of the content is garbled up like it was thrown into a shredder. This doesn't seem to happen every time, but its already happened to me about a half-dozen times.
The first time this happened, I obviously didn't expect it and the only editable copy of this document was destroyed. Now any time I want to convert to PDF I have to make a copy of the document beforehand or else risk my only editable copy useless.
Does anyone know why this might be happening, or how I might stop it?