I am using Okular in Ubuntu 11.04 as it has support to annotations and is faster to do a quick find across large documents. The annotations are not stored in the document, but are stored as metadata in some folder. I would like to know where Okular stores the metadata, so that I can create a symlink in Dropbox so that my annotations to the PDF are automatically backed up.
The answer to the below query mentions the location of the metadata in KDE, but I am using GNOME.