diff --git a/addons/document/document.py b/addons/document/document.py
index 824607fa2e8..375f24cd62a 100644
--- a/addons/document/document.py
+++ b/addons/document/document.py
@@ -77,7 +77,7 @@ class document_file(osv.osv):
         # the directory id now is mandatory. It can still be computed automatically.
         'parent_id': fields.many2one('document.directory', 'Directory', select=1, required=True),
         'file_size': fields.integer('File Size', required=True),
-        'file_type': fields.char('Content Type', size=32),
+        'file_type': fields.char('Content Type', size=64),
         # If ir.attachment contained any data before document is installed, preserve
         # the data, don't drop the column!
         'db_datas': fields.binary('Data', oldname='datas'),
@@ -141,6 +141,8 @@ class document_file(osv.osv):
         return super(document_file, self).copy(cr, uid, id, default, context)
 
     def write(self, cr, uid, ids, vals, context=None):
+        if not isinstance(ids, list):
+            ids = [ids]
         res = self.search(cr, uid, [('id', 'in', ids)])
         if not len(res):
             return False