Thanks Kevin,
all seem up-to-date. How can I narrow down the issue to a 3rd party add-on? When I update the Channel Form (Safecracker) I get a white screen with “no collections found” I am using Zoo Visitor to enhance the member section of the site and have asked for their input through their support channel, albeit no response has been received. I quick rewrite of the tags using Channel Form results the same, though….
Could you tell me if this error relates to the redirect after the form has been submitted? or is this purely an add-on related issue? (only found one thread similar on EE Exchange where the developer acknowledged the issue was add-on related)