We've had a bit of a bad run with copy and paste errors when setting up new configs in Bouncer, where we accidentally include a leading tab or trailing newline when adding new products or file locations. Typically QA will catch this (yay them) and there's a bit of excitement while we figure out what happened. You can fix the problem by using Edit on the entry, and then submitting it again without the human making any change. It would be really really good if bouncer did some validation/sanitization when new config is added.
At a bare minimum it would be helpful if leading and trailing whitespace was stripped from input, unless there's a valid reason to keep it there.