@Carolyn-Leverich-Atkinson are you playing 'regular' games, or 'challenge' games? in a 'challenge' game, you can play whatever you have, and if the opponent doesn't question it, the game won't either.

@Roslyn-Irvine which dictionary/word list are you using? i've never had a problem with 'tix', right back to the 'scrabulous' days...