ryancramerdesign/ProcessWire — pull request #99 by anilex (2012-04-24 16:34:26+00:00)
Title: Fix TinyMCE js error when some of the config values is a function, throwing js TypeError:

...js TypeError: Object function (ed) { if(ed.isDirty && docheck)... } has no method 'substr'.

I haven't investigated why "config" has functions in his values. The error was rarely found in Chrome and a few times in Firefox in one old and two new projects updated with the latest PW. Probably it is related to children count, I am not sure. I cant make a relation to some beta features like Repeater or multi-language fields either.