Apple has seeded the latest version of Mac OS X, Mac OS X 10.6.5 build 10H542 to its developer community, the new build replaces the previous edition which was itself introduced on September 2. There’s multiple fixes included in this release:

improve reliability with Microsoft Exchange servers resolve a delay between print jobs address a printing issue for some HP printers connected to an Airport Extreme resolve an issue when dragging contacts from Address Book to iCal address an issue where dragging an item from a stack causes the Dock to not automatically hide add SSL support for uploading files to iDisk resolve an issue with Wikipedia information not displaying correctly in Dictionary improve performance of MainStage on certain Mac systems resolve spacing issues with OpenType fonts improve reliability with some Bluetooth braille displays resolve a VoiceOver issue when browsing some web sites with Safari 5 address stability and performance of graphics applications and games

Via: MacRumors