Say when a document library with metadata columns is created a user with appropriate access to that document library or site collection is able to upload files but while editing it (Edit properties) gets HTTP 403 error (The Website Declined to Show the WebPage) but the administrator is able to do it without any issue.
The reason for this is that Sharepoint 2010 creates a hidden list “TaxonomyHiddenList” and saves Taxonomy Item in this list at site collection level. Now the weird part is like other lists this list by default does not inherit permissions from site collection. So, while editing user is not having access to this list and inturn gets error message on the Document Library using this list.
Simple Resoluton is to go to this list and set “Inherit Permissions from Parent” and it will give appropriate permission to every user.
For navigating to this list Enter URL in Given format “http://server/sitecollection/lists/taxonomyhiddenlist/“.