My 1.2.0 ( Fresh install ) is working fine. It will be a Live shop soon, after I finish uploading the products. Any suggestions...do i have to upgrade 1.2.1? After reading all the post in this regard...I really don know if I should.
Generally I think you would be better running 1.2.1 than 1.2.0 as there has been quite a few bugs fixed. Best to review the release notes to decide if any of the fixes are important for your situation - if not then no need to upgrade.
As with any upgrade, make sure you backup your database and files first, and then do an upgrade on a copy of the site to test everything is working as you expect.
(also note: there has been some security improvements that means logins will not work on a ‘localhost’ installation, so run your tests on a real server or edit your local hosts file to set a dummy domain name)
1. Back up database
2. Back up files
3. Turn off caching
4. Empty /var/cache
5. Do upgrade (Diff or SVN ideally) (Diff dry run first)
6. Test thoroughly, everywhere
7. If happy all is well, turn caching back on
Done. This is how I happily upgraded each and every time without a hitch.