The Goals Overview is working fine. After installing Piwik 0.5 clicking on a goal throws a JSON Parse Error:
"Open Flash Chart
JSON Parse Error Object
Error at character 175, line 1: [...]"
In [1660], fixes #1060 - escape " (double quotes); don't set json header when serving widget+data
In [1662], refs #1060 - triple escape double quotes
I updated the demo to SVN, and it seems to work fine now. http://piwik.org/demo/