Re: 1.8.3 release
1.8.3 is currently under development and is available directly from CVS. You can see details for checking out from CVS in various pages, HowToDev
It should become a stable release by the end of the month and be available through SourceForge.
q2) Backup everything first, filesystem and database., 1.8.3 should just contain file changes and no database update will be needed.