I think you may be wrong here: I have found that it is:
I was making some changes to some code within a form that contained a tableframe. When adding some new fields to this tableframe, the tableframe header got renamed automatically to the default name... Thinking that I should rename this back to what it was originally, I did so, but I named it with a capital.
<<*TSK TSK* Bad move troyu.>>
Even though the code appeared to be calling this tableframe by name, it was actually calling it with a lower case and not uppercase header.... I renamed this tableframe with lowercase, and it is now working fine....