Looks like WikiUtilities.java checks if an item has an effect with the same name, by using EffectDatabase.contains(), but that one (when called with a string, as it is here) calls the version of EffectDatabase.getEffectId() that is not looking for an exact match. Since the effect of the "blackberry polite" is "blackberry politeness", a non-exact match would make it think that there was both an item and an effect with the same name, in which case the wiki link would be correct. There's likely a bunch of other situations where that would fail.