The CodeIgniter project has released their latest version of their framework today - CodeIgniter 1.5.4:

Version 1.5.4 is primarily a maintenance release. For a list of all changes please see the Change Log. If you are currently running CodeIgniter please read the update instructions.

Included in the list of changes are things like:

• Added some additional mime types in application/config/mimes.php.
• Fixed MSSQL insert_id().
• Fixed a bug in display of queries with characters that would be interpreted as HTML in the Profiler output
• Updated the XSS Filtering to take into account the IE expression() ability and improved certain deletions to prevent possible exploits