I'm seeing a lot of notices:

Notice: Undefined variable: children_settings in checkall_form_after_build_recursive() (line 171 of /sites/all/modules/contrib/checkall/checkall.module).

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albertski created an issue. See original summary.

albertski’s picture

albertski commented
Status: Active » Closed (won't fix)

I'm thinking there was another module that was dynamically adding the checkboxes that was causing this.