[TYPO3-mvc] checkbox problem

[Christian Kartnig]

Hi there!

I have to push this again. Did nobody else come across this behaviour?

Everytime I display a form again after submit (e.g. for validation), the 
boolean checkboxes display this error:

 >>Checkbox viewhelpers can only be bound to properties of type boolean 
or array. Property "emailVisible" is of type "string". <<

Please help me, I really don't know what to do.

best regards,
Christian