screensize context seems not to work
(PHP 5.5.9 on the server)
I created a context with type "Device properties" and just put in the field "Maximum screen width (pixels)" a value (e.g. "768").
I put on a content element the context to "YES" (no other contexs set)
The content element is never shown up, not with manipulates iPhone user-agent nor with calling the page with my Samsung Galaxy S III.
In the backend the test with the iPhone user-agent gives me back a data-set with "display" section - so its detected right in the test.
Other contexts are working fine like phone, tablet or getVar.