The WordPress theme have released v3.4.1 which is a maintenance and security release.
Jeffro raised a point of reformating your blog for WordPress 2.7. I've been blogging with WordPress since late 2003 and have been the blog software go through tonnes of upgrades.
A secret to keeping your computer smoothly is to perform regular maintenance on your computer. Last week we covered ten tools to defragment your hard disk. Besides defragmenting, you should regularly clean all temporary files.