Salesforce Summer 13 - things I've noticed

Automated Apex Test Execution

The code at http://developer.force.com/cookbook/recipe/automated-unit-test-execution now produces different results.

In my case, the number of results has nearly tripled. Interestingly, the number of failed tests increased. This code shouldn't have excluded any failed tests, so it seems to me that there is a bug fix in Summer 13 for the ApexTestResult object. This means the outputs of this code prior to Summer 13 probably aren't trustworthy.

Developer Console - now slower than ever

I have to work with older versions of IE a lot (don't get me started). Prior to Summer 13, Developer Console was pretty slow but usable. Now I get a lot of hanging and the slow script dialog.