What steps will reproduce the problem? On Mac OS X 10.9.5 Export a PDF

Select: 1. Export to PDF 2. All pages, except background 3. Browse destination and enter filename 4. In the destination text box remove the filename only leaving the path ONLY 5. Hit Done

CAUTION hitting DONE this will erase all the files in the path above

What version of the product are you using? On what operating system? Mac OS X 10.9.5