I appreciate the ability to rename linked PDFs (part of the cleanup dialog). How about adding a field in preferences where we can specify what to rename the files, in case we'd like to use a pattern other than the default bibtex key? For example, in my case I like to name linked PDFs as such:
Doe - 2008 - Interesting article.pdf
Thus, it would be great if spaces could be supported in the PDF renaming pattern.