yeah sure mistakes can happen - but they do seem to do so awfully often when GW is involved... and when they do happen it takes GW ages to put out an FAQ, which more often than not completely fails to address most issues that concern the community (like the fact that it took them half a year to clarify that a Doom Scythe's Death Ray can't hit fliers... amusingly (or sadly... depends...) a few days before the FAQ came out I was putting that very question to a staff member in my local GW store - and he said they could... shows you just how good GW writes their rules...
Not that Privateer Press products are without their amusing little failures, especially the translations to german are golden... "Suppressing Fire" becomes "Spear Fire" by just changing Sperrfeuer to Speerfeuer - that one has almost become a classic among german players of various systems and games because it just happens so awfully often... one should think some company or other would learn...