OJS only indexes content on upload. Should it be necessary to do any major site re-configuration and re-index the files they would have to re-upload the material.

It would be quite useful for the system administrator to have a retroactive batch indexing function (one that probably only indexes chunks of material at a time to lower server strain) to ensure that all material uploaded is indexed properly.  

Our specific situtation involves newer PDFs (made with Acrobat 8 or 9) uploaded prior to an xPDF upgrade.  Since the xPDF error is only displayed in the command line, editors could be doing this sort of thing all the time without proper indexing.  That's just an example, though.  A tool for reindexing would be useful and likely save a great deal of time.