Two areas of potential vulnerability were identified and have been fixed. These had to do with a SQL injection vulnerability in one case and exposing hidden nodes in the other.
This release contains no new features. Those will be forthcoming.
SA-CONTRIB-2010-106: Fixing XSS issue when displaying the edited message.
Changes since DRUPAL-7-0-BETA3:
Security release for SA-CONTRIB-2010-104 - Relevant Content - Information Disclosure
Also includes many bug fixes since 1.4.