When viewing with the Web Inspector, I'm noticing that some of the resource files are called/loaded twice. At first I thought it was strictly two images I'm using in my Control Bar plugin—two custom sprite images—but I just now noticed that the *_messages_en.xml is also loaded twice.
The files appear to be identical except for two things:
The duplicate image files have additional Request Headers (Pragma, Origin, and Cache-Control).
The duplicate *_messages_en.xml file has a different value for its Keep-Alive Response Header and additional Request Headers (Referer and User-Agent)
Anyone have any ideas? Is anyone else experiencing this? Each of these files are only being called once by the XML files. I'm currently in the middle of optimization and these redundant requests have me scratching my head.