If you encounter problems when applying the security patch SUPEE-11555 and the update aborts at the media.js file, the issue may be caused by the line endings. In this case, the following message is displayed during the online store's update process: "checking file js/tiny_mce/plugins/media/js/media.js Hunk #1 FAILED at 483 (different line endings).1 out of 1 hunk FAILED". However, this can be fixed easily.
Simply open the file in Notepad++ and go to "Edit->EOL Conversion" and change the format from Unix to Windows. Save the file and run the PATCH again. Everything should then work properly. The same applies to the PATCH for the file /js/tiny_mce/plugins/media/editor_plugin_src.js!
Encountered at our web agency in an online store using the Magento 1.9 shop system.
