Forum software removing "and" and "or" from posts

By N0-1_H3r3, in Support

For the last few days, at least on the Dark Heresy, Rogue Trader, Deathwatch and Black Crusade forums, a number of posts have been appearing that appear to have had the words "and" and "or" (with the spaces to either side of them) removed at some point between the post being written and it being submitted to the forum.

Has anyone else noticed this problem, or found a way to keep it from happening?