I have had an issue where PDF documents are checked out by the user - even though in the version control is set to Require content approval for submitted items? and Require documents to be checked out before they can be edited? This happens spasmodically and only with PDF documents.
I have checked the DOCICON.xml settings are correct.
<Mapping Key="pdf" Value="pdficon_small.png" OpenControl="AdobeAcrobat.OpenDocuments" />
Has anyone had experience with this issue and how it may be fixed.
I am lead to believe it is an ADOBE reader issue on certain versions. I am not sure if this is correct - could someone confirm or contest.