If you have been working with PhoneGap 1.0 and trying to move to the latest version of PhoneGap, 1.5, one of the things that may leave you scratching your head, is a set of new files “cordova-1.5.0.js” and “cordova-1.5.0.jar” found in the PhoneGap distribution folder, instead of phonegap.js and phonegap.jar files.
You will notice that the MDS AppLaud plugin in Eclipse is also pretty confused about it.
This blog post may clear you off the name confusion.