Yes, if you read the full text of the changelog, it contains:
* Prevent LP: #643899 - Firefox sending header "Accept-Language:
chrome://global/locale/intl.properties" because the intl.accept_languages
preference is messed up. Drop a patch which causes the preferences
system to save a user preference when changing a preference value to equal
the system default value (and revert to the original behaviour where the
preference is just discarded). This should hopefully stop Firefox Sync
from breaking localized preferences where they haven't been modified by
the user, but does regress LP: #548866
Yes, if you read the full text of the changelog, it contains: //global/ locale/ intl.properties " because the intl.accept_ languages
* Prevent LP: #643899 - Firefox sending header "Accept-Language:
chrome:
preference is messed up. Drop a patch which causes the preferences
system to save a user preference when changing a preference value to equal
the system default value (and revert to the original behaviour where the
preference is just discarded). This should hopefully stop Firefox Sync
from breaking localized preferences where they haven't been modified by
the user, but does regress LP: #548866
which has been parsed as closing #548866.