During the update process I encountered the following errors
Notice: Undefined index: module in _field_info_prepare_instance_widget() (line 386 of /modules/field/field.info.inc). Notice: Undefined index: module in _field_info_prepare_instance_display() (line 354 of /modules/field/field.info.inc). Updates were attempted. If you see no failures below, you may proceed happily to the administration pages. Otherwise, you may need to update your database manually. All errors have been logged. Front page Administration pages The following updates returned messages webform module Update #7318 File components updated to support AJAX uploading. Update #7319 Webform file entries created in the file_usage table.
I checked one of my forms and tried to upload a file and got the folowing error.
Notice: Undefined index: previous_balance in file_ajax_upload() (line 270 of /modules/file/file.module). Notice: Undefined index: #suffix in file_ajax_upload() (line 279 of /modules/file/file.module).