Throws a javascript error in Sym 2.5

[stuartgpalmer]

With Sym 2.5 the custom field input shows for some sections but not for others. I have not been able to narrow it down to the presence of a specific field type in the section, but the error thrown follows.

I can grant access to the offending installation if it helps.

[Error] TypeError: 'undefined' is not an object (evaluating 'data[field_id].caption')
(anonymous function) (customfieldcaptions.sections.js, line 65)
each (symphony.min.js, line 14)
each (symphony.min.js, line 14)
(anonymous function) (customfieldcaptions.sections.js, line 56)
k (symphony.min.js, line 24)
fireWith (symphony.min.js, line 24)
ready (symphony.min.js, line 24)
g (symphony.min.js, line 14)