Piwik 1.1 - Security questions

Hello,

I have read that there were some security improvments in Piwik 1.1.
I know that Piwik uses Zend Framework as its basis and I use the ZF too for my web applications.
Now I have the question what was improved at the view of the security in Piwik 1.1?
Could you give some tips how to improve the security in ZF applications, Admin?

There are a number of users experiencing problems with the update to 1.1, so I’m providing upgrade support. As soon as this dies down, I’ll be publishing an advisory.