Apple has sent out another private beta software to developers asking them to test font compatibility and stability.

The company has also asked developers if they are able to test other components in the new software.The other components that are being evaluated include: QuickTime Player X, iCal, AppKit, Fonts, CoreMedia and the graphics drivers. According to AppleInsider there are four known issues that Apple has reported to developers. Improvements to other components, such as Rosetta and Software Updater, are also available in the new beta.

Mac OS X 10.6.3 will be the third update of Snow Leopard. The original version of Snow Leopard was found to have a bug that deleted user's data when they logged in or out of a guest account, this was fixed in version 10.6.2 released in November.

Reports suggest there have been over 60 individual crash-prone codes found in the latest version of Mac OS X 10.6.3. According to AppleInsider, people familiar with the build have reported that there is a total of 221 code corrections to 92 system components.The beta addresses issues with "hangs in iTunes, and potential anomalies while updating applications, viewing Display preferences, and navigating the ColourSync Utility Filters tab," according to AppleInsider.

Developers have also been asked if they can tweak mail-messaging displays, as it currently has the wrong background colour. There are also problems when trying to copy files to a shared Windows folder.

The build number for the latest beta software is 10D571 and weighs approximately 700MB, whereas the first version of Mac OS X 10.6.3 had a build number of 10D522 and weighed in at 665.7MB.