[ctcoke]

I have been using the previous versions of Calibre to modify the metadata of pdf files I downloaded with no problems (it always worked). Since upgrading to 0.5.10, modifying pdf metadata never sticks (i.e. I can make the changes to the book Calibre, but the pdf in the Calibre directory and the one I save to another directory do not contain the changes and have the same metadata as the original). This is true even for pdf files that I had previously modified the metadata using previous versions of Calibre. Is there a setting somewhere or a file in the program that needs to be replaced or modified?