The new Wordpress v2.2.3 released on 8th September.

2.2.3 is a security and bug-fix release for the 2.2 series. Since this is a security release, we suggest you upgrade immediately. Two of the fixes are high priority.
On our Trac you can see the bugs closed and the files changed for 2.2.3.
To get 2.2.3, please see our download page.
As always, upgrade instructions including an extended upgrade guide are available.

My recommendation:

Get Instant Upgrade Plugin to upgrade your Wordpress to the latest verison hassle free.

This plugin will automatically your Wordpress with one button. I have upgraded my previous version many times.

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