northbard has the details in a public post over
here. Particularly at risk are protein bars and the like. Salmonella is a fairly dangerous thing, and it doesn't leave any human-sense-apparent traces, so it's worth your while to check, if you use or consume peanut butter in North America (I believe; it may be further, that's all I'm aware of).
Spooky! - TG loves PB, and loves her bars (but doesn't use any of the listed ones, though
dbhalle1965 apparently does).