If you browse through the user library in OS X Lion, you may see a number of .plist.lockfile files in your preferences folder. Here is what these and other plist subtypes are all about. Topher Kessler ...

While the file's name does not include a .plist extension, the file follows the .plist format and opens just fine in Property List Editor. To locate the file in the Finder, type Command-Shift-G; in ...