"HttpHeaders.getAcceptableLanguages()" translates "en_us" to "en_US"

[KARR, DAVID (ATTSI)]

I'm seeing a subtle problem in 
"javax.ws.rs.core.HttpHeaders.getAcceptableLanguages()".  It appears to be 
translating a header value of "en_US" to a Locale with a value of "en_us".  The 
problem is, the object "Locale.US" has a locale string of "en_US".  If I check 
to see if "Locale.US" is in my locale list, it fails to find it.