While I couldn't verify earlier, I agree that even the demo is failing when trying to open trac / ticket / *

The http request returns nothing instead of returning the HTML (or an error): http://piwik.org/demo/index.php?filter_offset=0&module=Actions&action=getPageUrlsSubDataTable&idSite=1&period=day&date=yesterday&enable_sort=1&filter_sort_column=nb_visits&filter_sort_order=desc&filter_limit=100&search_recursive=1&viewDataTable=table&controllerActionCalledWhenRequestSubTable=getPageUrlsSubDataTable&totalRows=55&enable_filter_excludelowpop=0&idSubtable=26

I'm not sure what the error is as even the apache error logs are empty.

Can you check your http requests with firebug and see if you get some HTML back?

Do you have errors in your error logs?

Regarding the demo, trac/ticket seems to be the only directory not loading. Other directories load fine for me. Do you see the same thing in your Piwik install, or are most directories not loading?

(In [2292]) Fixes #1420 Shame on me... I left a smarty {debug} statement in there. Interestingly, this was making the whole http request fail (return a blank http 200 response) in some still unidentified cases..

(In [2293]) Refs #1420 Adding unit tests to check that there is no {debug} statements left in code

Wow, you are fast! Thank you very much for your quick reaction and the fix. Works like a charm now.

Shame on me, too. I saw that debug in the original changeset and assumed it was a work in progress, and never went back to see if you had later taken it out.