Have spent a couple of hours this morning upgrading to WordPress 2.8.5 this fixes a number of issues the key changes are detailed below
- A fix for the Trackback Denial-of-Service attack that is currently being seen.
- Removal of areas within the code where php code in variables was evaluated.
- Switched the file upload functionality to be whitelisted for all users including Admins.
- Retiring of the two importers of Tag data from old plugins.

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