WordPress just released Version 2.5.1 yesterday.
This latest version is suppose to patch 70 over bugs fixes and improving performance.
For those manages one or two WordPress blogs, transfer the entire WordPress 2.5.1 release to your web host and execute the upgrade process, should be quite easy and takes less than 20 minutes.
If you’re running many WordPress sites or wanted a much easy way to update your WordPress, just like the new feature in WordPress 2.5, where you can upgrade plugins in just few clicks.
Here is one of the solution.
Using the InstantUpgrade plugin, you can easily and safely upgrade your WordPress automatically with a few clicks.