This is the second alpha release of the new 2.4 series of LIMB which fixes a numerious amount of bugs and adds some new features.
Here's the list of the most noticeable changes:
PHP-4.4.x compatibility
locale constants cleanup: there's only one constant used LOCALE_ID
'locale_id' property removed from site_object
session is attached to the client ip
db drivers transaction fixes
AJAX based JIPs added
<limb:MEDIA>, <limb:SITE_BRANCH_SELECTOR>, <fetch:PARENT>, <limb:JS_BUNDLE>, <dev:DATASPACE> tags added
experimental low-level CLI support added