For those who like to wait until a “dot one” version is released before upgrading WordPress, now is your time. WordPress has made version 2.6.1 available for download. With 2.6.1, WordPress continues their trend of releasing a maintenance update shortly after a major release in order to fix bugs that always follow a “dot zero” release. This is not a security release. Upgrading is optional. If you’re happy with 2.6, you can keep on using it.
I had only one bug with my 2.6 WordPress. With Firefox (I haven’t tested the problem with any other browser), WordPress would log me out of the control panel after a certain time. This problem seems to be fixed with the new release. Check out the full list of over 60 fixes to see if 2.6.1 has something to offer you.
My advice. If 2.6 is working fine for you, then continue to use it. However, you’ll have to put up with that nag notice in the control panel. If you’re still using WordPress 2.5 because you were waiting for the dot one release of 2.6, then now is the time to upgrade.