I can see the following lines in the Updraft plus backup log. Is it a normal situation or there's an issue?
If I check UpDraft Plus uploaded latest files, I can see it the "themes.zip" files in my Dropbox account.
14233.622 (39) Delete file: backup_2013-10-16-1034_xxxxx_xxxxx_c6cb88b1a55d-themes.zip, service=dropbox
14233.659 (39) Dropbox: request deletion: backup_2013-10-16-1034_xxxxx_xxxxx_c6cb88b1a55d-themes.zip
14233.844 (39) Dropbox error: Path '/backup_2013-10-16-1034_xxxxx_xxxxx_c6cb88b1a55d-themes.zip' not found (line: 145, file: /home/xxxxx/public_html/wp-content/plugins/updraftplus/includes/Dropbox/OAuth/Consumer/Curl.php)