As soon as we acivate the quform plugin on the website the textboxes in the backend seem to be empty, see http://buzzn.it.
Deactivating the quforms brings the textbox content back.
I can post the code wordpress generates. And I could also found one difference in the generated code that might be responsible:
In one line some kind of responsible for the textboxes the generated code contains ….;settings"…. as soon as quform becoms activated this line contains ;settings"quot; i.e. some parsing seems to become broken.