The best example for what is happening is demonstrated here. My code is very, very similar to what is used in that link (I based mine off of it).
Load up that site and click the '+' button on the right hand side. You will get an error that states "Error encountered: Cannot convert NaN to ."
I've narrowed the problem to the _addRemoveRow function. It seems like something changed recently with how accessing FlexTable properties is done on callbacks. My code and the site I linked were working fine last night. Today, I get the error.
I looked to see if there were any changelog/release notes that could explain this, but came up empty handed.
Any assistance would be greatly appreciated.