Odd problem developed recently interactive flag, 'flickering'

I have a few files run at login (could be one big file, bug modularized by function)... I did a 'sudo' and caught caught by this... I hve a check to see if I am in an interactive session, if so I do some more stuff than if I was being called in a shell file. I turned on a debug line that prints

Re: Odd problem developed recently interactive flag, 'flickering'

Nevermind... :-| <*bang* (I had ${-/i} when I meant ${-//[^i]/}; not sure what I was thinking!)