WordPress 3.1.1 dropped today with nearly thirty maintenance and security fixes. A few of the highlights include:
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- Some security hardening to media uploads
- Performance improvements
- Fixes for IIS6 support
- Fixes for taxonomy and PATHINFO (/index.php/) permalinks
- Fixes for various query and taxonomy edge cases that caused some plugin compatibility issues
Anything that boosts performance and security is always a good idea, so upgrade as soon as you are able. You can upgrade manually by downloading 3.1.1 or you can opt for the automatic upgrade through your dashboard.