Image upload not working in v7 with php 5.4 for file field - an the work-arround
Problem:
When we upload an image with file-field, the image was uploaded in tmp-directory, but not transferred in image-directory. Result: The image can’t be displayed.
On the local system (WAMP with PHP 5.3) it works.
Environment of the production-server: PHP 5.4 on 1and1-Hosting-Provider
Work-Arround (solution?):
The problem lies in the lack of time zone definition!
We have changed the third-party-Modul “?\scriptcase7\devel\lib hird\blueimp\index.php”
Now, we call the “date_default_timezone_set”-function ? after the “error_reporting-call”.
for example:
error_reporting(E_ALL | E_STRICT);
date_default_timezone_set(‘Europe/Berlin’); <-------
This index.php is a template for the scriptcase-generation. And now scriptcase generate the code with this date_default_timezone_set-call.
AFTER GENERATION ALL MODULES -> IT WORKS 
I do not know if this solution applies generally. For us, this work-arround works and we will also sent this work-arround to SCRIPTCASE.